MAINLINE TEST DOMES
The Mainline® Test Dome Coupling™ (TDC) provides a safe and economical way to pressure test DWV systems without the need for specialized tools.
EXPLORE THE MAINLINE TEST DOME COUPLING
The Mainline® Test Dome Coupling™ (TDC) provides a safe and economical way to pressure test DWV systems without the need for specialized tools. The TDC can be installed during the ground phase of construction at the DWV-to-sewer cleanout connection point with various cleanout configurations on 3″ or 4″ pipe – ABS or PVC. A 12 ft. pull cord with integrated t-handle makes the removal of the test dome a breeze once the pressure test has been completed.
What's more, the Mainline Test Dome features a synthetic pre-greased cap that ensures the solvent cement does not bond/seize to the dome cap to prevent easy removal, which saves the plumbing contractor a step when installing.