D.C. Mun. Regs. tit. 12, r. 12-B3008

Current through Register Vol. 71, No. 49, December 6, 2024

Rule 12-B3008 - BACKWATER VALVES

Strike Section P3008.1 of the International Residential Code in its entirety and insert a new Section P3008.1 into the Residential Code in its place to read as follows:

P3008.1

General. Where plumbing fixtures are installed on a floor with a finished floor elevation below the elevation of the manhole cover of the next upstream manhole in the public sewer , such fixtures :

(a) shall be protected by a backwater valve installed in the building drain , branch of the building drain, or horizontal branch serving such fixtures; or

(b) shall discharge to a sump complying with Section P3007.3 and served by a sewage pump or ejector complying with Section P3007.4. Plumbing fixtures installed on a floor with a finished floor elevation above the elevation of the manhole cover of the next upstream manhole in the public sewer shall not discharge through a backwater valve or a sump. This section shall not apply to replacement in kind of compliant plumbing fixtures

Exception: Where the code official deems it appropriate for the protection of existing multi- level one- and two- family dwellings in flood prone areas, the retrofitting of backwater valves to be installed in the building drain or in a horizontal branch serving fixtures on a floor with a finished elevation above the adjacent manhole in the public sewer be allowed, thereby allowing such fixtures to discharge through the backwater valve.

Strike Section P3008.5 of the International Residential Code in its entirety and insert a new Section P3008.5 into the Residential Code in its place to read as follows:

P3008.5

Location. Backwater valves shall be installed so that access is provided to the working parts for service and repair. Valve access covers shall be watertight.

D.C. Mun. Regs. tit. 12, r. 12-B3008

Final Rulemaking published at 67 DCR 5679 (5/29/2020)