Location of Valves
Except as provided in Sentence (3), a drain port shall be provided on the water distribution system immediately downstream of the building control valve required by the Sentence (1) and if there is a meter, the drain port shall be installed immediately downstream of the meter side of the stop and waste valve.
For the purpose of identifying the pipe material where plastic (polybutylene, polyethylene or PVC) water pipe is used underground for a service pipe, the end of the pipe inside the building shall brought above ground for a distance not less than 300 mm and not greater than 450 mm.
When you install a check valve to protect a plastic water service from thermal damage or a backflow prevention device on the water service piping, you create a closed water distribution system. Any thermal expansion from a domestic hot water tank will cause system pressure to rise. If left unchecked, this increase in pressure may cause the temperature and pressure relief valves installed on the hot water tank to open and drip. To control this excess pressure, an expansion tank may be installed in the cold water distribution piping, or a specially designed float valve may be installed in one of the water closet tanks to relieve excess pressure into the overflow tube.
The design and installation of every piping system shall, where necessary, include means to accommodate expansion and contraction of the piping system caused by temperature or movement of the soil.
Where the water supply is to be metered, the
installation of the meter, including the piping that is part of the
meter, including the piping that is part of the meter installation and
the valving arrangement for the meter installation, shall be according to
the water purveyor's requirements.
Shut-off valves must be installed on the water supply to
A water distribution system shall be installed so that the system can be drained or blown out with air and for this purpose shall be provided.
Every water pipe that supplies a hot water tank, pressure vessel, plumbing appliance or water using device shall be provided with a shut-off valve located close to the tank, pressure vessel, plumbing appliance or water using device.
Every pipe that is supplied with water from a tank on the property that is gravity water tank or tank of a drinking-water system shall be provided with a shut-off valve located close to the tank.
Every pipe that passes through an exterior wall to supply water to the exterior of the building shall be provided with a frost-proof hydrant or a stop-an-wast valve located inside the building and close to the wall
where a self draining frost proof hydrant is used, a stop valve may be used in lieu of a stop and waste valve
Part 1 of the OBC:
Riser means a water distribution pipe that extends through one full storey.
Except for a single-family dwelling, every pipe shall be provided with a shut-off valve at the source of supply.
Shut-off valves shall be installed in every suite in a building of residential occupancy as may be necessary to ensure that when the supply to one suite is shut off the supply to the remainder of the building is not interrupted.
The water supply to each fixture in a washroom for public use shall be individually valved at each fixture and each valve shall be accessible.
This code section makes shut-off valves mandatory for urinals, lavatories, tanks type or direct flush water closets or any other fixture that may be installed in a public washroom.
Every water closet shall be provided with a shut-off valve on its water supply pipe.
The discharge pipe from every sanitary sewage sump shall be equipped with a union, a check valve and a shut-off valve installed in the sequence in the direction of discharge.
Except as provided in Sentence (3), (4) and (5) where a building drain or a branch may be subjected to backflow, a gate valve or a backwater valve shall be installed on every fixture drain connected to them when the fixture is located below the level of the adjoining street.
Where more than one fixture is located on a storey and all are connected to the same branch, the gate valve or backwater valve may be installed on the branch.