The Holdrite TESTRITE tee installs in-line between DWV pipe sections and allows the DWV line to be temporarily blocked for testing (available in 2 in., 3 in. and 4 in.), The TESTRITE tee includes a tee and clean out plug, which remains in the pipe system after test. It is designed to be used with the removable and reusable TESTRITE test wedge, which allows temporary blocking of the DWV stack for testing while providing connections for convenient system fill and drain. Drain flow may be interrupted, e.g., for partial tests, by opening and closing an integral valve in the test wedge. The TESTRITE tee may be used vertically or horizontally. Install as with any normal fitting.