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The MUELLER STREAMLINE DWVTESTCAP112 is a DWV test cap sized at 1-1/2 inches, designed for use during drain, waste, and vent system pressure and leak testing procedures. This fitting temporarily seals the open end of a 1-1/2 inch DWV pipe, allowing the system to hold air or water pressure during inspection. It is a standard tool in rough-in plumbing work, used by licensed plumbers to verify system integrity before walls are closed and final inspections are completed.
This test cap is suited for residential and light commercial DWV piping applications. It is typically installed during the rough-in phase of new construction or remodel projects, where drain and vent lines must be pressure-tested to meet local plumbing code requirements before the system is put into service. The 1-1/2 inch size fits common lavatory drain, trap arm, and vent branch lines.
Designed as an OEM-style fitting for use with 1-1/2 inch DWV piping systems in residential and light commercial plumbing applications.
Installation and removal of DWV test caps should be performed by a licensed plumber in accordance with the applicable plumbing code, such as the IPC or local amendments. Shut off the water supply and relieve any system pressure before installing or removing the cap. Use appropriate hand tools and follow the pipe material manufacturer guidelines for fitting engagement. Do not exceed the pressure ratings appropriate for DWV-rated fittings during testing.
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