3 inch x 4 inch PVC Cleanout with Plug

3 Inch x 4 Inch PVC Cleanout with Threaded Plug – Schedule 40 DWV

The 3 inch x 4 inch PVC cleanout with plug is a Schedule 40 DWV fitting used to provide accessible points for inspection, maintenance, and removal of obstructions in gravity drainage systems. This fitting features a 4-inch solvent-weld hub connection and a 3-inch internal female thread designed to receive a matching cleanout plug. The fitting supports compliance with building codes requiring accessible cleanouts at specific intervals and directional changes in horizontal drainage piping.

Design and Material Specifications

Manufactured from rigid polyvinyl chloride (PVC) in accordance with ASTM D2665 and D1784 (Cell Class 12454-B), this cleanout offers mechanical strength and dimensional consistency required for non-pressurized waste applications. Features include:

• ✅ Solvent-Weld Hub – 4 inch hub connection for joining to Schedule 40 DWV pipe or fittings using solvent cement per ASTM D2855 procedures.
• ✅ Internal Female Threads – Accepts a 3 inch MNPT plug for secure sealing; plug includes raised square or slotted head for tool access.
• ✅ Serviceability – Allows direct access to system internals for mechanical rodding or visual inspection without pipe disassembly.

Installation Parameters

Install cleanout vertically at code-specified intervals or transitions. Clean all mating surfaces before solvent welding. Apply primer and cement according to manufacturer and code requirements. Thread sealant or PTFE tape may be applied to the plug threads to aid in sealing and future removal.

Use Cases

This cleanout is typically installed in residential and commercial DWV systems near base-of-stack locations, horizontal offsets, or fixture branch intervals. Its reduced 3 inch threaded access within a 4 inch hub body allows efficient space usage while meeting required pipe sizing standards.

Technical Summary

• Material: PVC (ASTM D2665)
• Nominal Size: 3 inch threaded plug x 4 inch hub
• Fitting Type: Cleanout with removable plug
• Application: Gravity-flow DWV systems only (non-pressurized)
• Certifications: NSF 14 Listed, UPC/IAPMO compliant

Code Compliance

Conforms to cleanout access requirements under IPC Section 708 and UPC Section 707. Designed to allow clearances necessary for rodding tools and to facilitate code-required service access points in drainage installations.

The 3 Inch x 4 Inch PVC Cleanout with Threaded Plug is a standard component in DWV layouts requiring accessible cleanout provisions. Its robust, solvent-weld hub and removable threaded plug ensure long-term service access in code-compliant drainage systems.