The following modifications and amendments to the 2018 International Plumbing Code (IPC) are hereby adopted:
(A) IPC Modification. Whenever the International Plumbing Code refers to the "code official" it shall mean the person appointed or designated by the municipal governing body to administer and enforce the provisions of the Plumbing Code.
(B) (1) Amend Section 106.1 "Where required" so when amended it reads as follows:
106.1 Where required. Any owner, owner's authorized agent or contractor who desires to construct, enlarge, alter, repair, move, demolish or change the occupancy of a building or structure, or to erect, install, enlarge, alter, repair, remove, convert or replace any plumbing system (including residential and non-residential irrigation sprinkler systems), the installation of which is regulated by this code, or to cause any such work to be performed, shall first make application to the code official and obtain the required permit for the work.
(2) Amend Section 106 "Permits" by adding the following section:
106.3.4 Irrigation located in the right-of-way. Components of the irrigation system located within the public right-of-way or easements are installed at the owner's risk and shall be the owner's responsibility to replace and/or repair in the event of the utilization of the easement or right-of-way.
(3) Amend Section 301.6 "Prohibited locations" so when amended it reads as follows:
301.6 Prohibited locations. Plumbing systems shall not be located in an elevator shaft or in an elevator equipment room.
Exception: Floor drains, sumps and sump pumps shall be permitted at the base of the shaft provided they are indirectly connected to the plumbing system, and that the elevator is not operated by a hydraulic system. Elevators operated by petroleum hydraulic systems and that will connect to sanitary plumbing system shall be provided with an oil water separator before connecting to the plumbing system. The oil/water separator shall be sized and designed by a State of Tennessee Licensed and Registered Mechanical Engineer. Shaft drains may be piped or pumped to containment. The containment vessel or tank shall be sized by the elevator manufacturer.
(4) Amend Section 305.4.1 "Sewer depth" by inserting the number 12 in place of both bracketed words [NUMBER] so when amended it reads as follows:
305.4.1 Sewer depth. Building sewers that connect to private sewage disposal systems shall be a maximum of 12 inches below finished grade at the point of septic tank connection. Building sewers shall be a minimum of 12 inches below grade. The dimensions shall be taken from the top of the pipe.
(5) Amend Section 312.3 "Drainage and vent air test" so when amended it reads as follows:
312.3 Drainage and vent air test. An air test shall be made by forcing air into the system until there is a uniform gauge pressure of 5 psi (34.5 kPa) or sufficient to balance a 10-inch (254 mm) column of mercury. This pressure shall be held for a test period of not less than 15 minutes. Any adjustment to the test pressure required because of changes in ambient temperature or the sealing of gaskets shall be made prior to the beginning of the test period.
Exception: Testing of plastic piping shall not exceed 5 psi.
(6) Amend Section 403.2 "Separate facilities" Exception #3 so when amended it reads as follows:
Exceptions:
3. Separate facilities shall not be required in mercantile occupancies with a maximum net floor area of 3000 square feet.
(7) Amend Section 504.7.1 "Pan size and drain" by increasing the size of the drain pipe from 3/4 inch to 1 inch so when amended it reads as follows:
The pan shall be drained by an indirect waste pipe having a diameter of not less than 1 inch (25.4 mm).
(8) Amend Section 603.1 "Size of water service pipe" by increasing the water service pipe size from 3/4 inch to 1 inch so when amended it reads as follows:
603.1 Size of water service pipe. The water service pipe shall be sized to supply water to the structure in the quantities and at the pressures required in the Code. The minimum diameter of water service pipe shall be 1 inch (25.4 mm).
(9) Amend Tables 605.3 "Water Service Pipe" and 605.4 "Water Distribution Pipe" to delete all references to Tvpe M and WM copper or copper-alloy.
(10) Amend Section 605.5 "Fittings" to add the following sentence at the end of the section as follows:
Water distribution fittings shall not be placed under slab installations unless prior approval is made with the Code Official.
(11) Amend Section 608.17.5 by adding section 608.17.5.1 as follows:
608.17.5.1 A reduced pressure backflow preventer and all components shall be installed to meet the following conditions:
1. A valve shall be placed within close proximity of the water meter.
2. A minimum of schedule 40 service pipe shall be installed from the meter to the backflow preventer.
3. The schedule 40 service pipe shall be buried at a minimum depth of 12 inches.
4. There shall be a minimum of 12 inches of gravel at the bottom of the backflow preventer.
5. Each backflow preventer shall be tested and certified by an individual certified by the State of Tennessee to test such devices. The test results shall be on site at the time of inspection.
(12) Amend Table 709.1 by increasing the minimum size of a shower drain to 2 inches and adding footnote "i" as follows:
i. For showers with two or more shower valves the drain and strainer shall be 3 inches in diameter or additional drains shall be added.
(13) Amend Section 903.1 by inserting the number 10 in place of the bracketed word [NUMBER] so when amended it reads as follows:
903.1 Roof extension. Open vent pipes that extend through a roof shall be terminated not less than 10 inches (254 mm) above the roof. Where a roof is to be used for assembly or as a promenade, observation deck, sunbathing deck or similar purposes, open vent pipes shall terminate not less than 7 feet (2134 mm) above the roof.
(14) Amend Table 913.4 by adding footnote "a" as follows:
a. A minimum 2" diameter main vent is required on all installations.
(Ord. 2020-06, passed 9-14-20)