Drain, Waste, & Vent (DWV) and Fixture Tests

Purpose:
To test the system for leakage and retarded flow

Equipment:
Water source, removable plugs, recycling pump tester optional

Procedure:
After all connections and drain lines are installed the waste and vent system have to be tested by one of the three following methods for evidence and indication of leakage.

1. Water test. Before plumbing fixtures are connected, all of the opening into the piping have to be plugged and the system subjected to a static water test for 15 minutes by filling it with water to the top of the highest vent opening. There shouldn’t be any evidence of leakage.
2. Flood level test. After all fixtures are installed, the drain system is filled with water to the level of the toilet bowl or to the clothes washer standpipe using a hose. The water level in each toilet is noted. Water levels should not be less than 3 inches. After all trapped air has been released, the test is hold for at least 15 minutes. The system is checked for any evidence of leaks. A drop in the water level in toilets or designated fixtures is an indication of system failure.
3. Air test. First all DWV systems that are plugged into piping system are filled with water and the entire system is pressurized with air to a 2-inch water column load (0.072 psi).The air pressure is kept for 3 minutes. In case there is a loss of pressure, the leakage location can be identified by pumping smoke into the system, or with the use of soapy water to the exterior of the system.