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The MUELLER STREAMLINE PDWV4818112 is a male NPT plug fitting made from PVC for use in drain, waste, and vent (DWV) piping systems. This 1-1/2 inch threaded plug is designed to seal open female-threaded pipe ends, capping off unused ports or temporarily closing lines during service or inspection. PVC construction makes it suitable for non-pressure DWV applications where corrosion resistance and chemical compatibility with household drain waste are required. Plumbers and pipefitters install this type of fitting during rough-in, testing, and maintenance work on residential and light commercial DWV systems.
This plug is used in gravity-fed drain, waste, and vent piping systems found in residential and light commercial construction. Typical applications include capping branch tees, cleanout openings, and test ports during pressure testing or when a branch line is not yet in service. The 1-1/2 inch male NPT thread size is common on sink drain branches, trap arms, and vent stub-outs.
Designed as an OEM-style replacement or standard-use fitting for 1-1/2 inch female NPT threaded ports in residential and light commercial PVC DWV piping systems.
Installation is performed by licensed plumbers or qualified pipefitters in accordance with applicable plumbing codes such as the IPC or UPC. Before installing or removing any DWV plug, ensure the system is depressurized and drained. Apply PTFE thread tape or an appropriate pipe thread sealant to the male threads before hand-tightening, then snug with a strap wrench. Do not overtighten PVC threaded fittings, as excess torque can crack the fitting or the mating port.
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