Div. B › Part 7 › 7.2 › 7.2.11 — Water Service Pipes and Fire Service Mains

7.2.11.4 — Required Check Valve

Copied! ▲ ▼

(1) Where a water service pipe is supplied with water by more than one drinking water system, a check valve shall be installed at each connection with a drinking water system.

(2) Where a fire service main is supplied with water by more than one source, a check valve shall be installed at each connection with a source of water.

OBC Definitions

Defined terms on this page

check valve

means a valve that permits flow in only one direction and prevents a return flow.

fire service main

means a pipe and its appurtenances that are connected to a source of water and that are located on a property, (a)between the source of water and the base of the riser of a water-based fire protection system, (b)between the source of water and inlets to foam making systems, (c)between the source of water and the base elbow of private hydrants or monitor nozzles, (d)as fire pump suction and discharge piping not within a building, or (e)beginning at the inlet side of the check valve on a gravity or pressure tank.

water service pipe

means a pipe on the property that conveys potable water from a drinking water system or a private water supply to the inside of the building.

water system

means a water service pipe, a private water supply, a water distribution system, a fire service main or any part of any of them.

On this page