4-2-24: PLUMBING CODE ADOPTED:

   (A)   Code Adopted: There is hereby adopted by reference as if fully set out herein that certain code known as the Illinois State Plumbing Code, prepared and published by the Illinois Department of Public Health (IDPH), together with the additions, insertions, deletions and changes hereinafter set forth, three (3) copies of which have been on file for a period of more than thirty (30) days prior to the adoption of this section and are now on file in the Office of the Village Clerk.

         The design and installation of plumbing systems, including sanitary and storm drainage, sanitary facilities, water supplies and stormwater and sewage disposal in buildings shall comply with the requirements of this section and accepted engineering practices as defined in the Illinois State Plumbing Code.

   (B)   Amendments: The following additions, insertions, deletions and changes are hereby made to the Illinois Plumbing Code:

      1.   Amendment of Section 890.630 by adding a new section "j" to read as follows:

            "j) A safe pan will be required for water heaters, furnaces and clothes washers located above living/occupied areas."

      2.   Deletion of Section 890.1130 c) Backflow in its entirety and in lieu thereof substitute and insert the following:

            "c) Backflow. A Reduced Pressure Zone (R.P.Z.) will be required on all new commercial buildings on both the fire and domestic water service."

      3.   Amend Section 890.1340 Determination of Sizes for Drainage Systems by deleting paragraph (b)(2) in its entirety and in lieu thereof substitute with the following new Paragraph (b)(2):

            "(b)(2) Any dwelling containing any floor (including basement floors) below grade at foundation is required to have an overhead sewer. All fixtures located below grade shall drain to an ejector pit with pump. Approval of the Building Official or his/her designee shall be required for any other type of installation. Pressure-building drains shall be sized in accordance with the ejector pump manufacturer's recommendation, but shall not be less than 2 inches in diameter."

      4.   In section 890.1380 Storm Water Drainage within a Building. Amend by adding a new section "a" to the end of the paragraph:

            "a) Sizing of piping and appurtenances related to building storm drainage shall conform to building standards as referenced in the Village of Willowbrook Ordinance, 4-2-24(C)8, Storm Drainage."

      5.   Section 890.1410 Materials amend by adding the following new subsection "c":

            "c) Refer to Village of Willowbrook chart indicating approved materials for piping."

      6.   Delete Section 890 Appendix A - Table A: Approved Building Drainage/Vent Pipe in its entirety and in lieu thereof substitute the Village of Willowbrook chart indicating approved materials for piping.

      7.   Delete Section 890 Appendix A - Table A: Approved Materials For Water Service Pipe in its entirety and in lieu thereof substitute the Village of Willowbrook chart indicating approved materials for piping and add:

            Minimum 5'-6" of cover on all outside water mains/services is required.

      8.   Delete Section 890. Appendix A - Table A: Approved Materials For Water Distribution Pipe in its entirety and in lieu thereof substitute the Village of Willowbrook chart indicating approved materials for piping.

      9.   (Appendix A/Page-53) Section 890 Appendix A - TABLE P: Demand at Individual Water Outlets. Amend by adding the following new subsections "a & b":

            a) All Fixtures shall bear the "WaterSense" product label, as specified by the USEPA.

            b) All new and/or replacement lawn irrigation sprinkler systems shall be equipped with a "WaterSense" labeled irrigation controller and be in compliance with Section 2.5(g) of the Illinois Plumbing License Law [225 ILCS 320].

   (C)   Additional Standards And Specifications:

      1.   Approved Materials For Piping Chart:

VILLAGE OF WILLOWBROOK APPROVED MATERIALS FOR PIPING

Material Type		Residential	Commercial
Underground waste and vent:
	Cast iron soil	X	X
	PVC schedule 40 (no cell core)	X	X
Aboveground waste and vent:
	Cast iron (lead joints/repair only)	X	X
	Cast iron no hub	X	X
	Galvanized pipe	X	X
	PVC schedule 40 (no cell core)	X	X
	Copper type M, L, and K	X	X
Aboveground storm:
	Cast iron (lead joints/repair only)	X	X
	Cast iron no hub	X	X
	Galvanized pipe	X	X
	PVC schedule 40 (no cell core)	X	X
	Copper type M, L, and K	X	X
Underground water:
	Ductile iron Class 52	X	X
	Copper type K	X	X
Aboveground water:
	Copper type L	X	X
	Copper type K	X	X

Revised 08/06/2015

      2.   Separate Water Tap For Fire Sprinkler System: Where a public water supply is used to serve as the water supply for a private automatic fire sprinkler system, a separate and independent water tap onto the water main shall be utilized. The water tap for the fire sprinkler system shall be made a minimum of ten feet (10') horizontally from the domestic water tap, and shall extend to an exterior valve vault prior to continuing into the building. The valve vault shall be made fully accessible and contain an approved valve which will shut off the water supply to the fire sprinkler system if required. The incoming water service for the fire sprinkler system shall enter the building separate from the domestic water service, and shall be provided with all necessary backflow prevention and valve assemblies as are required for a fire sprinkler system water supply.

      3.   Fireflow Meter: All fire suppression systems installed subsequent to the date of the adoption of this chapter shall be equipped with a fireflow meter of a size and type approved by the Village of Willowbrook Water Department.

      4.   Lawn Sprinkling Systems: No pipe, sprinkler head, valve or any other portion of any lawn sprinkling system shall be located in or upon any public right-of-way or in any easement.

      5.   Sprinkler Heads In Public Rights-Of-Way: Notwithstanding any provision contained in the previous paragraph to the contrary, sprinkler heads, and pipes leading thereto, may be located in or upon public rights-of-way or easements, provided that all portions thereof shall be located not more than six feet (6') from the property line, the final location being subject to the approval of the building official or his/her designee; and further provided that the owner of the sprinkler system shall first have executed a written release in favor of the Village in the form acceptable to the building official or his/her designee.

      6.   Car Wash Installations: All newly constructed or remodeled car wash installations shall be equipped with a water recycling system, unless otherwise permitted by the DuPage County Department of Environmental Concerns and approved by the building official or his/her designee.

      7.   Plumbing Permit Required: In the case of improvements on residential, commercial or industrial buildings or property, the issuance of a plumbing permit is required to make the following repairs, replacements or changes:

         (a)   Conversion from galvanized water piping to copper.

         (b)   Addition of any plumbing fixture.

         (c)   Replacement of boiler or water heater.

         (d)   Installation or conversion to overhead sewer system or antiflood system.

         (e)   Underground lawn sprinkling systems.

         (f)   Plumbing changes or additions to any part of the waste, vent, water piping or sewer system.

      8.   Storm Drainage: The provisions of this chapter shall govern the materials, design, construction and installation of storm drainage.

         (a)   Where Required: All roofs, paved areas, yards, courts and courtyards shall drain into a separate storm sewer system, or a combined sewer system, or to an approved place of disposal. For one- and two-family dwellings, multi family-buildings, commercial/industrial buildings, and where approved, stormwater is permitted to discharge onto flat areas, such as streets or lawns, provided that the stormwater flows away from the building.

         (b)   Prohibited Drainage: Stormwater shall not be drained into sewers intended for sewage only.

         (c)   Tests: The conductors and the building storm drain shall be tested in accordance at the discretion of the inspector.

         (d)   Change In Size: The size of a drainage pipe shall not be reduced in the direction of flow.

         (e)   Fittings And Connections: All connections and changes in direction of the storm drainage system shall be made with approved drainage-type fittings in accordance with the Illinois Plumbing Code. The fittings shall not obstruct or retard flow in the system.

         (f)   Roof Design: Roofs shall be designed for the maximum possible depth of water that will pond thereon as determined by the relative levels of roof deck and overflow weirs, scuppers, edges or serviceable drains in combination with the deflected structural elements. In determining the maximum possible depth of water, all primary roof drainage means shall be assumed to be blocked.

         (g)   Cleanouts Required: Cleanouts shall be installed in the storm drainage system and shall comply with the provisions of this Code for sanitary drainage pipe cleanouts.

Exception: Subsurface drainage system.

         (h)   Backwater Valves: Storm drainage systems shall be provided with backwater valves.

            (1)   Storm Backflow: Where the flood level rims are below the elevation of the manhole cover of the next upstream manhole in the public storm sewer, such fixtures shall be protected by a backwater valve installed in the building storm drain.

            (2)   Material: All bearing parts of backwater valves shall be of corrosion-resistant material. Backwater valves shall comply with ASME A112.14.1, CSA B181.1 or CSA B181.2.

            (3)   Seal: Backwater valves shall be so constructed as to provide a mechanical seal against backflow.

            (4)   Diameter: Backwater valves, when fully opened, shall have a capacity not less than that of the pipes in which they are installed.

            (5)   Location: Backwater valves shall be installed so that access is provided to the working parts for service and repair.

         (i)   Materials: See Village of Willowbrook chart indicating approved materials for piping (subsection (C)1 of this section).

         (j)   Traps:

            (1)   Main Trap: Leaders and storm drains connected to a combined sewer shall be trapped. Individual stormwater traps shall be installed on the stormwater drain branch serving each conductor, or a single trap shall be installed in the main storm drain just before its connection with the combined building sewer or the public sewer.

            (2)   Material: Stormwater traps shall be of the same material as the piping system to which they are attached.

            (3)   Size: Traps for individual conductors shall be the same size as the horizontal drain to which they are connected.

            (4)   Cleanout: An accessible cleanout shall be installed on the building side of the trap.

         (k)   Roof Drains:

            (1)   Strainers: Roof drains shall have strainers extending not less than four inches (4") above the surface of the roof immediately adjacent to the roof drain. Strainers shall have an available inlet area, above roof level, of not less than one and one-half (11/2) times the area of the conductor or leader to which the drain is connected.

            (2)   Flat Decks: Roof drain strainers for use on sun decks, parking decks and similar areas that are normally serviced and maintained shall comply with subsection (C)8(k)(1) of this section or shall be of the flat-surface type, installed level with the deck, with an available inlet area not less than two (2) times the area of the conductor or leader to which the drain is connected.

            (3)   Roof Drain Flashings: The connection between roofs and roof drains which pass through the roof and into the interior of the building shall be made water-tight by the use of approved flashing material.

         (l)   Size Of Conductors, Leaders And Storm Drains:

            (1)   General: The size of the vertical conductors and leaders, building storm drains, building storm sewers, and any horizontal branches of such drains or sewers shall be based on the 100-year hourly rainfall rate of three inches (3") per hour.

            (2)   Vertical Conductors And Leaders: Vertical conductors and leaders shall be sized for the maximum projected roof area, in accordance with tables 1106.2(1) and 1106.2(2) of this subsection.

TABLE 1106.2(1)
SIZE OF CIRCULAR VERTICAL CONDUCTORS AND LEADERS

Diameter Of Leader (Inches) 1	Horizontally Projected Roof Area (Square Feet)
	Rainfall Rate (Inches Per Hour)
	1	2	3	4	5	6	7	8	9	10	11	12
2	2,880	1,440	960	720	575	480	410	360	320	290	260	240
3	8,800	4,400	2,930	2,200	1,760	1,470	1,260	1,100	980	880	800	730
4	18,400	9,200	6,130	4,600	3,680	3,070	2,630	2,300	2,045	1,840	1,675	1,530
5	34,600	17,300	11,530	8,650	6,920	5,765	4,945	4,325	3,845	3,460	3,145	2,880
6	54,000	27,000	17,995	13,500	10,800	9,000	7,715	6,750	6,000	5,400	4,910	4,500
8	116,000	58,000	38,660	29,000	23,200	19,315	16,570	14,500	12,890	11,600	10,545	9,600

 

For SI: 1 inch = 25.4 mm, 1 square foot = 0.0929 m2.

Note:

1.    Sizes indicated are the diameter of circular piping. This table is applicable to piping of other shapes, provided the cross-sectional shape fully encloses a circle of the diameter indicated in this table. For rectangular leaders, see table 1106.2(2) of this subsection. Interpolation is permitted for pipe sizes that fall between those listed in this table.

TABLE 1106.2(2)
SIZE OF RECTANGULAR VERTICAL CONDUCTORS AND LEADERS

Dimensions Of Common Leader Sizes Width x Length (Inches) 1	Horizontally Projected Roof Area (Square Feet)
	Rainfall Rate (Inches Per Hour)
	1	2	3	4	5	6	7	8	9	10	11	12
13/4 x 21/2	3,410	1,700	1,130	850	680	560	480	420	370	340	310	280
2 x 3	5,540	2,770	1,840	1,380	1,100	920	790	690	610	550	500	460
23/4 x 41/4	12,830	6,410	4,270	3,200	2,560	2,130	1,830	1,600	1,420	1,280	1,160	1,060
3 x 4	13,210	6,600	4,400	3,300	2,640	2,200	1,880	1,650	1,460	1,320	1,200	1,100
31/2 x 4	15,900	7,950	5,300	3,970	3,180	2,650	2,270	1,980	1,760	1,590	1,440	1,320
31/2 x 5	21,310	10,650	7,100	5,320	4,260	3,550	3,040	2,660	2,360	2,130	1,930	1,770
33/4 x 43/4	21,960	10,980	7,320	5,490	4,390	3,660	3,130	2,740	2,440	2,190	1,990	1,830
33/4 x 51/4	25,520	12,760	8,500	6,380	5,100	4,250	3,640	3,190	2,830	2,550	2,320	2,120
31/2 x 6	27,790	13,890	9,260	6,940	5,550	4,630	3,970	3,470	3,080	2,770	2,520	2,310
4 x 6	32,980	16,490	10,990	8,240	6,590	5,490	4,710	4,120	3,660	3,290	2,990	2,740
51/2 x 51/2	44,300	22,150	14,760	11,070	8,860	7,380	6,320	5,530	4,920	4,430	4,020	3,690
71/2 x 71/2	100,500	50,250	33,500	25,120	20,100	16,750	14,350	12,560	11,160	10,050	9,130	8,370

 

Note:

1.    Sizes indicated are nominal width x length of the opening for rectangular piping.

            (3)   Building Storm Drains And Sewers: The size of the building storm drain, building storm sewer and their horizontal branches having a slope of one-half (1/2) unit or less vertical in twelve (12) units horizontal (4-percent slope) shall be based on the maximum projected roof area in accordance with table 1106.3 of this subsection. The minimum slope of horizontal branches shall be one-eighth (1/8) unit vertical in twelve (12) units horizontal (1-percent slope) unless otherwise approved.

TABLE 1106.3
SIZE OF HORIZONTAL STORM DRAINAGE PIPING

Size Of Horizontal Piping (Inches)	Horizontally Projected Roof Area (Square Feet)
	Rainfall Rate (Inches Per Hour)
	1	2	3	4	5	6
1/8 unit vertical in 12 units horizontal (1% slope):
3	3,288	1,644	1,096	822	657	548
4	7,520	3,760	2,506	1,800	1,504	1,253
5	13,360	6,680	4,453	3,340	2,672	2,227
6	21,400	10,700	7,133	5,350	4,280	3,566
8	46,000	23,000	15,330	11,500	9,200	7,600
10	82,800	41,400	27,600	20,700	16,580	13,800
12	133,200	66,600	44,400	33,300	26,650	22,200
15	218,000	109,000	72,800	59,500	47,600	39,650
1/4 unit vertical in 12 units horizontal (2% slope):
3	4,640	2,320	1,546	1,160	928	773
4	10,600	5,300	3,533	2,650	2,120	1,766
5	18,880	9,440	6,293	4,720	3,776	3,146
6	30,200	15,100	10,066	7,550	6,040	5,033
8	65,200	32,600	21,733	16,300	13,040	10,866
10	116,800	58,400	38,950	29,200	23,350	19,450
12	188,000	94,000	62,600	47,000	37,600	31,350
15	336,000	168,000	112,000	84,000	67,250	56,000
1/2 unit vertical in 12 units horizontal (4% slope):
3	6,576	3,288	2,295	1,644	1,310	1,096
4	15,040	7,520	5,010	3,760	3,010	2,500
5	26,720	13,360	8,900	6,680	5,320	4,450
6	42,800	21,400	13,700	10,700	8,580	7,140
8	92,000	46,000	30,650	23,000	18,400	15,320
10	171,600	85,800	55,200	41,400	33,150	27,600
12	266,400	133,200	88,800	66,600	53,200	44,400
15	476,000	238,000	158,800	119,000	95,300	79,250

 

For SI: 1 inch = 25.4 mm, 1 square foot = 0.0929 m2.

            (4)   Vertical Walls: In sizing roof drains and storm drainage piping, one-half (1/2) of the area of any vertical wall that diverts rainwater to the roof shall be added to the projected roof area for inclusion in calculating the required size of vertical conductors, leaders and horizontal storm drainage piping.

            (5)   Parapet Wall Scupper Location: Parapet wall roof drainage scupper and overflow scupper locations shall comply with the requirements of the International Building Code.

            (6)   Size Of Roof Gutters: The size of semicircular gutters shall be based on the maximum projected roof area in accordance with table 1106.6 of this subsection.

TABLE 1106.6
SIZE OF SEMICIRCULAR ROOF GUTTERS

Diameter Of Gutters (Inches)	Horizontally Projected Roof Area (Square Feet)
	Rainfall Rate (Inches Per Hour)
	1	2	3	4	5	6
1/16 unit vertical in 12 units horizontal (0.5% slope):
3	680	340	226	170	136	113
4	1,440	720	480	360	288	240
5	2,500	1,250	834	625	500	416
6	3,840	1,920	1,280	960	768	640
7	5,520	2,760	1,840	1,380	1,100	918
8	7,960	3,980	2,655	1,990	1,590	1,325
10	14,400	7,200	4,800	3,600	2,880	2,400
1/8 unit vertical in 12 units horizontal (1% slope):
3	960	480	320	240	192	160
4	2,040	1,020	681	510	408	340
5	3,520	1,760	1,172	880	704	587
6	5,440	2,720	1,815	1,360	1,085	905
7	7,800	3,900	2,600	1,950	1,560	1,300
8	11,200	5,600	3,740	2,800	2,240	1,870
10	20,400	10,200	6,800	5,100	4,080	3,400
1/4 unit vertical in 12 units horizontal (2% slope):
3	1,360	680	454	340	272	226
4	2,880	1,440	960	720	576	480
5	5,000	2,500	1,668	1,250	1,000	834
6	7,680	3,840	2,560	1,920	1,536	1,280
7	11,040	5,520	3,860	2,760	2,205	1,840
8	15,920	7,960	5,310	3,980	3,180	2,655
10	28,800	14,400	9,600	7,200	5,750	4,800
1/2 unit vertical in 12 units horizontal (4% slope):
3	1,920	960	640	480	384	320
4	4,080	2,040	1,360	1,020	816	680
5	7,080	3,540	2,360	1,770	1,415	1,180
6	11,080	5,540	3,695	2,770	2,220	1,850
7	15,600	7,800	5,200	3,900	3,120	2,600
8	22,400	11,200	7,460	5,600	4,480	3,730
10	40,000	20,000	13,330	10,000	8,000	6,660

 

For SI: 1 inch = 25.4 mm, 1 square foot = 0.0929 m2.

         (m)   Secondary (Emergency) Roof Drains:

            (1)   Secondary Drainage Required: Secondary (emergency) roof drains or scuppers shall be provided where the roof perimeter construction extends above the roof in such a manner that water will be entrapped if the primary drains allow buildup for any reason.

            (2)   Separate Systems Required: Secondary roof drain systems shall have the end point of discharge separate from the primary system. Discharge shall be above grade, in a location that would normally be observed by the building occupants or maintenance personnel.

            (3)   Sizing Of Secondary Drains: Secondary (emergency) roof drain systems shall be sized in accordance with subsection (C)8(l) of this section based on the rainfall rate for which the primary system is sized in tables 1106.2(1), 1106.2(2), 1106.3 and 1106.6 of this subsection (C). Scuppers shall be sized to prevent the depth of ponding water from exceeding that for which the roof was designed as determined by subsection (C)8(f) of this section. Scuppers shall not have an opening dimension of less than four inches (4"). The flow through the primary system shall not be considered when sizing the secondary roof drain system.

         (n)   Values For Continuous Flow; Equivalent Roof Area: Where there is a continuous or semicontinuous discharge into the building storm drain or building storm sewer, such as from a pump, ejector, air conditioning plant or similar device, each gallon per minute of such discharge shall be computed as being equivalent to ninety six (96) square feet of roof area, based on a rainfall rate of one inch (1") per hour.

         (o)   Subsoil Drains: Subsoil drains shall be open-jointed, horizontally split or perforated pipe conforming to one of the approved materials for piping in accordance with subsection (C)1 of this section. Such drains shall not be less than four inches (4") in diameter. Where the building is subject to backwater, the subsoil drain shall be protected by an accessibly located backwater valve. Subsoil drains shall discharge to a trapped area drain, sump, dry well or approved location above ground. The subsoil sump shall not be required to have either a gas-tight cover or a vent. The sump and pumping system shall comply with subsection (C)8(q) of this section.

         (p)   Building Subdrains: Building subdrains located below the public sewer level shall discharge into a sump or receiving tank, the contents of which shall be automatically lifted and discharged into the drainage system as required for building sumps. The sump and pumping equipment shall comply with subsection (C)8(q) of this section.

         (q)   Sumps And Pumping Systems: The sump pump, pit and discharge piping shall conform to the following subsections.

            (1)   Pump Capacity And Head: The sump pump shall be of a capacity and head appropriate to anticipated use requirements.

            (2)   Sump Pit: The sump pit shall not be less than eighteen inches (18") in diameter and twenty four inches (24") deep, unless otherwise approved. The pit shall be accessible and located such that all drainage flows into the pit by gravity. The sump pit shall be constructed of tile, steel, plastic, cast-iron, concrete or other approved material, with a removable cover adequate to support anticipated loads in the area of use. The pit floor shall be solid and provide permanent support for the pump.

            (3)   Electrical: Electrical service outlets, when required, shall meet the requirements of NFPA 70.

            (4)   Piping: Discharge piping shall comply with the approved materials chart at subsection (C)1 of this section and shall include a gate valve and a full flow check valve. Pipe and fittings shall be the same size as, or larger than, pump discharge tapping.

Exception: In one- and two-family dwellings, only a check valve shall be required, located on the discharge piping from the pump or ejector.

      9.   Work Without Benefit Of A Permit: When work requiring a permit has been started prior to the issuance of such permit, the permit fee shall be double the amount of the standard permit fee. However, in no instance shall the fee for a permit issued under these circumstances exceed the standard permit fee by an amount in excess of:

         (a)   Residential Districts: Two hundred fifty dollars ($250.00).

         (b)   Nonresidential Districts: Seven hundred fifty dollars ($750.00).

   (D)   Backflow Prevention:

      1.   Cross Connection Prohibited:

         (a)   Cross connections between potable water systems and other systems or equipment containing water or other substances of unknown or questionable quality are prohibited except when and where, as approved by the Department of Municipal Services, suitable protective devices such as the reduced pressure zone backflow preventer or equal are installed, tested and maintained to ensure proper operation on a continuing basis.

         (b)   To protect the public water system from contamination due to contaminants through the water service connection into the public water system, a program of inspection and regulation shall be provided.

         (c)   The building official or his/her designee or his designated agent, who shall be either a licensed plumber or an approved cross connection control device inspector, shall inspect the plumbing in every building or premises served by the public water system as frequently as in his judgment may be necessary to ensure that such plumbing has been installed and maintained in such a manner as to prevent the possibility of pollution of the water supply of the Village. The building official or his/her designee shall notify or cause to be notified in writing the owner, or authorized agent of the owner of any such building or premises, to correct, within a reasonable time period set by the building official or his/her designee any plumbing installed or existing contrary to or in violation of this section, and which, in his judgment, may therefore permit the pollution of the Village water supply, or otherwise adversely affect the public health.

         (d)   The building official or his/her designee or his designated agent, who shall be either a licensed plumber or an approved cross connection control device inspector, shall have the right of entry into any building during reasonable hours for the purpose of making inspection of the plumbing systems installed in such building or premises; provided, that with respect to the inspection of any single-family dwelling, consent to such inspection shall first be obtained from a person of suitable age and discretion therein or in control thereof. Refusal to allow inspection of a specific dwelling may be cause for requiring installation of suitable backflow protection or to cause discontinuance of potable water service.

      2.   Definitions: For the purposes of this subsection, the following definitions shall apply:

   AIR GAP: The unobstructed vertical distance through the free atmosphere between the lowest opening from any pipe or faucet supplying water to a tank, plumbing fixture or other device and the flood-level rim of the receptacle.

   APPROVED: Accepted by the Willowbrook Department of Municipal Services as meeting an applicable specification stated or cited in this section, or as suitable for the proposed use.

   AUXILIARY SUPPLY: Any water source or system other than the potable water supply that may be available in the building or premises.

   BACK SIPHONAGE: The flowing back of used, contaminated or polluted water due to a negative gauge or subatmospheric pressure in that pipe.

   BACKFLOW: The flow of any water, foreign liquids, gases or other substances back into the distribution pipes of the potable water system.

   BACKFLOW PREVENTER: A device or means to prevent backflow.

   CONTAMINATION: See definition of pollution.

   CROSS CONNECTION: Any actual or potential connection between the potable water supply and a source of contamination or pollution.

   DRAIN: Any approved pipe that carries waste water or waterborne wastes in a building drainage system.

   FIXTURE-PLUMBING: Installed with receptacles, devices or appliances supplied with water or that receive or discharge liquids for liquid borne wastes.

   FLOOD LEVEL RIM: The edge of the receptacle from which water flows.

   HAZARD, HEALTH: Any conditions or devices which, in the judgment of the building official or his/her designee may create a danger to the health and well-being of the water consumer. An example of a health hazard is a structural defect in the water supply system, whether of location, design or construction, that regularly or occasionally may prevent satisfactory treatment of the water supply or cause it to be polluted from extraneous sources.

   HAZARD, PLUMBING: Any arrangement of plumbing, including piping and fixtures, whereby a cross connection can be created.

   HYDROPNEUMATIC TANK: A pressure vessel in which air pressure acts upon the surface of the water contained within the vessel pressurizing the water distribution piping connected to the vessel.

   OUTLET: The open end of the water supply pipe through which the water is discharged into the plumbing fixture.

   PLUMBING SYSTEM: Includes the water supply and distribution pipes, plumbing, fixtures and traps; soil, waste and vent pipes; building drains and building sewers, including their respective connections, devices and appurtenances within the property lines of the premises; and water treating or water using equipment.

   POLLUTION: The presence of any foreign substance (organic, inorganic, radiological or biological) in water that tends to degrade its quality so as to constitute a hazard or impair the usefulness of the water.

   REDUCED PRESSURE PRINCIPLE BACKFLOW PREVENTER: An assembly of differential valves and check valves including an automatically opened spillage port to the atmosphere designed to prevent backflow.

   SURGE TANK: The receiving, nonpressure vessel forming part of the air gap separation between a potable and an auxiliary supply.

   VACUUM: Any pressure less than that exerted by the atmosphere.

   VACUUM BREAKER, NONPRESSURE TYPE: A vacuum breaker designed so as not to be subjected to static line pressure.

   VACUUM BREAKER, PRESSURE TYPE: A vacuum breaker designed to operate under conditions of static line pressure.

   WATER, NONPOTABLE: Water that is not safe for human consumption or that is of questionable potability.

   WATER, POTABLE: Water free from contaminants in amounts sufficient to cause disease or harmful physiological effects. Its bacteriological and chemical quality shall conform to the requirements of the Federal and State drinking water regulations and to any regulations of the public health authority having local jurisdiction.

      3.   Technical Requirements:

         (a)   Design, Installation And Maintenance Of Potable Water Supply System; Connections Prohibited Unless Protected Against Backflow: A potable water supply system shall be designed, installed and maintained in such a manner so as to prevent contamination from nonpotable liquids, solids or gases being introduced into the potable water supply through cross connections or any other piping connections to the system. Connection to the potable water supply system is prohibited unless protected against backflow as set out herein. Examples of fixtures and equipment from which the potable water supply system must be protected include, but are not limited to:

            (1)   Bidets;

            (2)   Operating, dissection, embalming and mortuary tables or similar equipment. In such installation, the hose used for water supply shall terminate at least twelve inches (12") away from every point of the table or attachments;

            (3)   Pumps for nonpotable water, chemicals or other substances; priming connections may be made only through an air gap; and

            (4)   Building drainage, sewer or vent systems.

         (b)   Connections To Boilers: Potable water connections to boilers shall be made through an air gap or provided with an approved backflow preventer.

         (c)   Refrigerating Unit Condensers And Cooling Jackets: Except where potable water provided for a refrigerator condenser or cooling jacket is entirely outside the piping or tank containing a toxic refrigerant, the inlet connection shall be provided with an approved check valve. Also adjacent to and at the outlet side of the check valve, an approved pressure relief valve set to relieve at five (5) pounds per square inch (psi) above the maximum water pressure at the point of installation shall be provided if the refrigeration units contain more than twenty (20) pounds of refrigerants.

         (d)   Protection Against Backflow And Back Siphonage: The following regulations shall apply to protection against backflow and back siphonage:

            (1)   Water Outlets: A potable water system shall be protected against backflow and back siphonage by providing and maintaining at each outlet an air gap, as specified below, between the potable water outlet and the flood level rim of the fixture it supplies or between the outlet and any other source of contamination, or an approved device or means to prevent backflow.

            (2)   Minimum Required Air Gap:

               A.   How Measured: The minimum required air gap shall be measured vertically from the lowest end of a potable water outlet to the flood level rim or line of the fixture or receptacle into which it discharges.

               B.   Size: The minimum required air gap shall be twice the effective opening of a potable water outlet unless the outlet is a distance less than three (3) times the effective opening away from a wall or similar vertical surface in which case the minimum required air gap shall be three (3) times the effective opening of the outlet. In no case shall the minimum required air gap be less than two inches (2").

         (e)   Certification Of Devices To Prevent Backflow Or Back Siphonage: Before any device for the prevention of backflow or back siphonage is installed, it shall have first been certified by the Foundation for Cross Connection Control Research of the University of Southern California and/or the National Sanitation Foundation. Devices, other than reduced pressure zone backflow preventers, installed in a building's potable water supply distribution system for protection against backflow shall be maintained in good working condition by the person or persons responsible for the maintenance of the system. Reduced pressure zone backflow preventers installed in a building's potable water supply distribution system shall be tested and/or maintained by State certified backflow preventer maintenance/tester as otherwise provided for in this code. The building official or his/her designee shall routinely inspect such devices, and if they are found to be defective or inoperative, shall require the replacement thereof.

         (f)   Installation Of Devices: The following shall apply to the installation of certain devices:

            (1)   Atmospheric vacuum breakers (nonpressure type) shall be installed with the critical level at least six inches (6") above the flood level rim of the fixture they serve and on the discharge side of the last control valve to the fixture. No shutoff valve or faucet shall be installed beyond the vacuum breaker. For closed equipment or vessels such as pressure sterilizers, the top of the vessel shall be treated as the flood level rim but a check valve shall be installed on the discharge side of the vacuum breaker.

            (2)   A reduced pressure principle type backflow preventer may be installed subject to full static pressure.

            (3)   Backflow and back siphonage preventing devices containing backflows to separate fixtures shall be accessibly located, preferably in the same room with the fixture they serve. Installation in utility or service spaces, provided they are readily accessible, is also permitted.

         (g)   Below Rim Supply:

            (1)   Where a potable water outlet terminates below the rim of a tank or vat and the tank or vat has an overflow of a diameter not less than two inches (2"), the overflow pipe shall be provided with an air gap as close to the tank as possible.

            (2)   The potable water outlet to the tank or vat shall terminate at a distance not less than one and one-half (11/2) times the height to which water can rise in the tank above the top of the overflow. This level shall be established at the maximum flow rate of the supply to the tank or vat and with all outlets except the air gap overflow outlet closed. The distance from the outlet to the high water level shall be measured from the critical point of the potable water supply outlet.

         (h)   Installation Of Approved Devices: Approved devices to protect against backflow and back siphonage shall be installed at all fixtures and equipment where backflow and/or back siphonage may occur and where a minimum air gap cannot be provided between the water outlet to the fixture or equipment and its flood level rim as follows:

            (1)   Where a water connection is not subject to back pressure, a vacuum breaker shall be installed on the discharge side of the last valve on the line serving the fixture or equipment.

            (2)   Where a potable water connection is made to a line, fixture, tank, vat, pump or other equipment with a hazard of backflow or back siphonage where the water connection is subject to back pressure, and an air gap cannot be installed, the building official and/or the Superintendent of Public Works or his/her designee(s) will require adequate protection, which may include the use of an approved reduced pressure principle backflow preventer.

         (i)   Booster Pumps: When a booster pump is used on a water pressure booster system and the possibility exists that a positive pressure of less than twenty (20) pounds per square inch (psi) may occur on the suction side of the pump, there shall be installed a low pressure cutoff on the booster pump to prevent the creation of a vacuum or negative pressure on the suction side of the pump, thus cutting off water to other outlets.

      4.   Backflow Prevention Devices Required: All construction requiring permits by the Department of Municipal Services which involve either construction revisions, alterations or additions to the potable water distribution system of the building or premises or upon a commercial unit reoccupancy, the installation of a backflow prevention device immediately downstream of the water meter shall be required. The following provisions shall apply to such installations of backflow devices:

         (a)   Issuance: Issuance of a permit.

         (b)   Installation: Backflow preventers shall be installed by a licensed plumber at the sole expense of the owner of the premises being served. Reduced pressure principle backflow preventers shall be installed as follows:

            (1)   Installation shall be in a location where the unit is readily accessible for maintenance and testing. Location should be immediately "downstream" of the water meter.

            (2)   Minimum clearances recommended by the manufacturer shall be observed.

            (3)   The unit shall be protected against flooding and freezing.

            (4)   Free draining of the relief port must be maintained under all conditions and provisions such as floor drains shall be provided.

            (5)   If installed at ceiling level, a collection system shall be installed with proper air gap under the drain port to protect areas below the unit from water damage.

            (6)   There shall be no reduction made in the size of the relief port drain.

            (7)   Provision shall be made for easy and unrestricted removal of the unit.

         (c)   Testing Of Reduced Pressure Principle Backflow Preventers:

            (1)   Annual Testing: Each year the Village will require the testing of each reduced pressure backflow preventer installed.

            (2)   Responsibility Of Building Owner Or Tenant: Testing of units shall be the responsibility of the building owner or tenant. All RPZ recertifications and testing shall be performed by a cross connection control device inspector (CCCDI) in accordance with the State Plumbing Code. Costs for tests, parts and/or replacement of units will be the responsibility of the building owner.

            (3)   Testing Of Initial Installation: Testing of initial installation prior to occupancy shall be required.

            (4)   Annual Inspection And Testing Scheduling: The building owner or tenant shall cause the inspection and testing of all RPZs each year based on the anniversary date of the installation. Such tests shall be conducted within thirty (30) days of the anniversary date.

            (5)   RPZ Certification Form: The RPZ certification form indicating the RPZ is operating effectively and being maintained in accordance with all State and local code requirements and manufacturer's recommendations shall be forwarded to the Village of Willowbrook upon every test or recertification performed.

            (6)   Tampering Prohibited: No persons other than a State licensed plumber or State certified backflow preventer maintenance/tester shall remove, repair, test or perform any maintenance on any reduced pressure principle backflow prevention device.

            (7)   Owner Assistance: Owners of all reduced pressure principle backflow preventers shall provide easy access to units and/or necessary tools and equipment, ladders or scaffolding to assist the Department of Municipal Services or Village inspector in inspecting the units, all at owner's expense.

         (d)   Units Out Of Service Or In Need Of Repair: When a unit is out of service or otherwise is in need of service, the Department of Municipal Services shall be notified within twenty four (24) hours.

         (e)   Bypasses: If there is only one service line and the water service cannot be interrupted, a second backflow preventer may be installed parallel with the first. Under no circumstance will a backflow preventer be bypassed by unprotected piping.

      5.   Corrections And Protective Devices: Any user of water shall obtain written approval from the Department of Municipal Services for any proposed corrective action or protective device before using or installing it. The total time allowed for completion of the necessary corrections shall be contingent upon the degree of hazard involved and include the time required to obtain and install equipment. If the cross connection has not been removed within the time as hereinafter specified, the Village shall physically separate the Willowbrook water supply from the on-site piping system in such manner that the two (2) systems cannot be connected by any unauthorized person.

      6.   Piping Identification: When a secondary water source is used in addition to the Willowbrook water supply, exposed Willowbrook water and secondary water piping shall be identified by distinguishing colors or tags and so maintained that each pipe may be traced readily in its entirety; it will be necessary to protect the Willowbrook water supply at the service connection in a manner acceptable to the Department of Municipal Services.

      7.   Private Water Storage Tanks: A private water storage tank supplied from the Willowbrook water supply system shall be deemed a secondary water supply unless it is designed and approved for potable water usage.

      8.   Elimination Of Existing Cross Connections: All existing cross connections to the Willowbrook water supply system shall be eliminated. The expense of such elimination shall be that of the owner of the property on which such cross connection exists.

      9.   Where Protection Is Required:

         (a)   An approved backflow device shall be installed on all connections to the public water supply as described in the Plumbing Code, 77 Illinois Administrative Code part 890. In addition, an approved backflow prevention device shall be installed on each service line to a consumer's water system serving the premises, where in the judgment of the building official or his/her designee, actual or potential hazards to the public water supply system exist.

         (b)   An approved backflow prevention device shall be installed on each service line to a consumer's water system serving premises where the following conditions exist:

            (1)   Premises having an auxiliary water supply, unless such auxiliary supply is accepted as an additional source by the building official or his/her designee and the source is approved by the Illinois Environmental Protection Agency.

            (2)   Premises on which any substance is handled which can create an actual premises having sources or systems containing process fluids or waters originating from the public water supply system which are no longer under the sanitary control of the building official or his/her designee.

            (3)   Premises having internal cross connections that, in the judgment of the building official or his/her designee and/or the cross-connection control device inspector, are not correctable or intricate plumbing arrangements which make it impractical to determine whether or not cross connections exist.

            (4)   Premises where, because of security requirements or other prohibitions or restrictions, it is impossible or impractical to make a complete cross connection survey.

            (5)   Premises having a repeated history of cross connections being established or reestablished.

         (c)   An approved backflow prevention device shall be installed on all connections to the public water supply as described in the Plumbing Code, 77 Illinois Administrative Code part 890. In addition, an approved backflow prevention device shall be installed on each service line to a consumer's water system serving, but not necessarily limited to, the following types of facilities, unless the building official and/or the Superintendent of Public Works or his/her designee(s) determines that no actual or potential hazard to the public water supply system exists:

            (1)   Hospitals, mortuaries, clinics, nursing homes.

            (2)   Laboratories.

            (3)   Piers, docks, waterfront facilities.

            (4)   Sewage treatment plants, sewage pumping stations or stormwater pumping stations.

            (5)   Food or beverage processing plants.

            (6)   Chemical plants.

            (7)   Metal plating industries.

            (8)   Petroleum processing or storage plants.

            (9)   Radioactive material processing plants or nuclear reactors.

            (10)   Car washes.

            (11)   Pesticide, herbicide or extermination plants and trucks.

            (12)   Farm service and fertilizer plants and trucks.

      10.   Type Of Protection Required:

         (a)   The type of protection required under subsections (D)9(b)(1), (D)9(b)(2) and (D)9(b)(3) of this section shall depend on the degree of hazard which exists as follows:

            (1)   An approved fixed proper air gap separation shall be installed where the public water supply system may be contaminated with substances that could cause a severe health hazard.

            (2)   An approved fixed proper air gap separation or an approved reduced pressure principle backflow prevention assembly shall be installed where the public water supply system may be contaminated with a substance that could cause a system or health hazard.

            (3)   An approved fixed proper air gap separation or an approved reduced pressure principle backflow prevention assembly or a double check valve assembly shall be installed where the public water supply system may be polluted with substances that could cause a pollution hazard not dangerous to health.

         (b)   The type of protection required under subsections (D)9(b)(4) and (D)9(b)(5) of this section shall be an approved fixed proper air gap separation or an approved reduced pressure principle backflow prevention device.

         (c)   Where a public water supply or an auxiliary water supply is used for a fire protection system, reduced pressure principle backflow preventers shall be installed on fire safety systems connected to the public water supply when:

            (1)   The fire safety system contains antifreeze, fire retardant or other chemicals.

            (2)   Water is pumped into the system from another source.

            (3)   Water flows by gravity from a nonpotable source; or water can be pumped into the fire safety system from any other source.

            (4)   There is a connection whereby another source can be introduced into the fire safety system.

         (d)   All other fire safety systems connected to the potable water supply shall be protected by a double check valve assembly on metered service lines and a double detector check valve assembly on unmetered service lines.

      11.   Backflow Prevention Devices:

         (a)   All backflow prevention devices or methods required by these rules and regulations shall be approved by the Research Foundation for Cross Connection Control of the University of Southern California, American Water Works Association, American Society of Sanitary Engineering, American National Standards Institute or certified by the National Sanitation Foundation to be in compliance with applicable industry specifications.

         (b)   Installation of approved devices shall be made in accordance with the manufacturer's instructions. Maintenance as recommended by the manufacturer of the device shall be performed. The manufacturer's maintenance manual shall be available on site at all times.

      12.   Notification Of Violation: The building official and/or the Superintendent of Public Works or his/her designee(s) shall notify the owner, or authorized agent of the owner, of the building or premises in which there is found a violation of this section. The building official and/or the Superintendent of Public Works or his/her designee(s) shall set a reasonable time period, based on the level of hazard to health, for the owner to have the violation removed or corrected. Upon failure of the owner to have the defect corrected by the end of the specified time interval, the building official and/or the Superintendent of Public Works or his/her designee(s) may, if in his judgment an imminent health hazard exists, cause the water service to the building or premises to be terminated, and/or recommend such additional fines or penalties to be invoked as herein may be provided.

      13.   Fines: The owner, or authorized agent of the owner responsible for maintenance of the plumbing systems in the building, who knowingly permits a violation to remain uncorrected after the expiration of time set by the building official or his/her designee shall, upon conviction thereof by the court, be required to pay a fine as otherwise provided for in this Code. (Ord. 19-O-10, 6-24-2019)