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The MUELLER INDUSTRIES 2938 is a 1-1/2 inch ABS cleanout plug designed for drain, waste, and vent (DWV) piping systems. Injection-molded from acrylonitrile butadiene styrene (ABS), this plug provides a removable, threaded seal at cleanout access points, test tee openings, and system terminations. ABS construction resists corrosion, abrasion, and the chemical exposure typical of non-pressurized residential and light commercial drain lines. The threaded design seats securely into female ABS threaded fittings while allowing straightforward removal when the line needs to be accessed or tested.
This plug is suited for residential and light commercial DWV applications where a serviceable, temporary, or permanent seal is required at a cleanout opening or system termination. Common installation scenarios include cleanout tees, test tee caps, and branch terminations in ABS drain and vent piping. Licensed plumbers and pipefitters install this fitting during new construction, remodel rough-in, or system repair. It is not rated for pressurized service and must be used only in non-pressurized DWV configurations.
Designed as an OEM-style replacement and standard fitting for 1-1/2 inch female-threaded ABS DWV fittings, including cleanout tees and test tees in non-pressurized drain, waste, and vent piping systems.
Installation is performed by a licensed plumber in accordance with the International Plumbing Code (IPC) and applicable local amendments. Ensure the receiving female fitting threads are clean and free of debris before seating the plug. No solvent cement is used with threaded plugs; thread-seal tape may be applied per local code requirements for temporary or test installations. Always verify the system is depressurized and drained before removing an installed cleanout plug.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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