Testing the Unit
All backwater valves are factory tested through our certified quality control program. If you wish to test the backwater valves, follow these instructions.
Why a Mainline Valve
How it Works
Mainline Backflow Products
Canadian Home Builders' Association
Mechanical Contractors Association of Alberta
- Place a "Test Ball" through the cleanout plug on the body, downstream of the valve into the outlet drainage piping leading away from the valve.
- Inflate the test ball.
- Through the cleanout opening, stretch a garden hose down to the "Test Ball" and begin filling the pipe with water.
- Watching through the cleanout opening, you should see the gate rise intothe closed position. This means the valve is closing properly. During a sewer back surge, back pressure will increase downstream of the valve, and the gate will seat onto the valves o-ring, protecting the building from backflow.
- Deflate the "Test Ball" to release the water. This will allow the gate to fall back into the open position.