4 inch PVC DWV Plug

4 inch PVC DWV Plug – MPT Termination Fitting for Drainage Systems

The 4 inch PVC DWV Plug with Male Pipe Thread (MPT) is designed for use in non-pressurized drain, waste, and vent systems. It provides a threaded termination point for test access, cleanout closure, or temporary sealing during system construction and inspection phases. Made from rigid polyvinyl chloride, this plug ensures a durable, watertight seal in DWV configurations where maintenance access or system closure is required.

The fitting conforms to dimensional and performance standards for Schedule 40 DWV components, making it compatible with standard female-threaded PVC or ABS fittings in horizontal or vertical drainage installations.

Key Features

• ✅ Material: PVC (polyvinyl chloride), suitable for DWV service
• ✅ Connection: Male Pipe Thread (MPT) – threaded termination for test caps or cleanout closure
• ✅ Size: 4 inches nominal
• ✅ Standards: Complies with ASTM D2665 and CSA B181.2 for DWV fittings
• ✅ Application: Used in gravity-flow drainage systems, test assemblies, and cleanout access points

Installation Notes

Apply PTFE tape or an approved thread sealant to the male threads to ensure a secure fit into a corresponding female-threaded hub or fitting. Hand-tighten, then apply minimal torque using a wrench or plug wrench where applicable. Avoid over-tightening to prevent stress cracking of the fitting or mating component. This plug is not rated for pressurized systems.

Common Use Cases

This plug is typically installed in DWV cleanouts, test tees, or end-of-line closures during new construction, renovation, or inspections. It provides easy access to sections of piping for testing, rodding, or system isolation without permanent sealing. Suitable for use in both residential and light commercial plumbing installations.

Material Application Note

PVC plugs should be used only in systems designated for non-pressurized applications. For pressure-rated systems or chemical waste, consult fitting specifications and local code requirements before installation.

The 4 inch PVC DWV MPT Plug offers a reliable solution for temporary or permanent sealing of threaded openings in gravity drainage networks. Its durable construction and standardized threading make it an essential fitting for service access and system testing in code-compliant DWV systems.