The Illinois State Plumbing Code, 77 Illinois Administrative Code 890, at 29 Ill. reg. 5713, and all appendices, promulgated by the Illinois Department of Public Health, is hereby adopted in its entirety, except such portions thereof as may be expressly deleted, modified or amended by this section.
A. While the Illinois Plumbing Code and all appendices have hereinabove been adopted, the following exceptions thereto (consisting of certain deletions and changes) shall control wherever such exceptions are applicable or are in conflict with certain other provisions of that code:
1. A new section 890.560, Sanitary System Flood Control And Backwater Valves, shall be inserted to be and read as follows:
890.560. Sanitary System Flood Control And Backwater Valves.
a. Sewer Pipe: All sewer pipe in a flood control system shall be either schedule 40 PVC plastic with solvent weld joints, or schedule 26 PVC "O" ring pipe, or service weight cast iron.
b. Bypass Piping To Sump: Bypass piping shall be piped from the overflow fitting in the building sewer to discharge directly into the sump pit. Open tees shall not be considered as a direct connection. All sumps shall be provided with approved metal covers.
c. Vaults For Flood Control Systems: All vaults for flood control systems shall be a minimum of 60 inches in diameter, the construction of which shall conform to the specifications for manholes contained in chapter 16, article V of the Mount Prospect village code. This minimum shall be adhered to unless otherwise specifically approved by the plumbing inspector because of space constraints.
d. Cleanout Required: A full size cleanout is required on the street side of the flood control vault.
e. Backwater Valves: All backwater valve assemblies must be ASME/ANSI listed. Backwater valves shall not be installed inside the building at the base of the soil stack. All backwater valves for flood control shall be located either at the foundation wall, or in an approved vault that complies with subsection c.
2. The following additional requirements are hereby adopted:
a. The following piping systems shall be installed only with the materials listed below:
(1) Building sewer: SDR 26, gasketed push-joint clay, cast iron. Six inch (6") minimum diameter outside building. All building drains, in new construction, shall be installed as overhead installations to the sanitary sewer as required in subsection 16.502K of the Mount Prospect village code. Alterations or remodeling of existing basement plumbing with gravity sewers shall require an overhead installation connecting the ejector pump discharge into the soil stack at a height of seven feet (7') above the floor.
(2) Underground drain, waste and vent: Cast iron, schedule 40 PVC.
(3) Aboveground drain, waste and vent: Cast iron, galvanized iron, DWV copper, schedule 40 PVC.
(4) Underground water supply: Type K copper, ductile iron. Refer to subsection 16.403J2 of the Mount Prospect village code for the minimum size.
(5) Aboveground water supply: Types M, L, or K copper, galvanized iron pipe, brass, stainless steel pipe.
3. Where a building contains a floor, basement or cellar with plumbing fixtures below grade, the sewer shall be run overhead, and all below grade plumbing fixtures shall drain to an approved sanitary ejector pit.
4. Wet venting shall be allowed by the plumbing inspector only when a plumbing fixture cannot be individually vented due to structural conditions.
1.5. Pursuant to 17 Illinois administrative code 3730.307(c)(4) and subject to the Illinois plumbing code (77 Ill. adm. code 890) and the lawn irrigation contractor and lawn sprinkler system registration code (77 Ill. adm. code 892), be it hereby ordained that in the village of Mount Prospect, all new plumbing fixtures and irrigation controllers installed after the effective date hereof shall bear the WaterSense label (as designated by the U.S. environmental protection agency WaterSense program), when such labeled fixtures are available.
(Ord. 6303, 2-21-2017)