4 inch x 3 inch ABS DWV Bushing Fitting x Plastic

4 inch x 3 inch ABS DWV Bushing – Schedule 40 Reducing Fitting

The 4 inch x 3 inch ABS DWV Bushing is designed for use in drainage, waste, and vent (DWV) systems to reduce the diameter of a socket connection from 4 inches to 3 inches. It is suitable for non-pressurized piping assemblies in horizontal or vertical installations where pipe size transitions are required within building code-compliant plumbing systems.

Molded from acrylonitrile butadiene styrene (ABS), this bushing is impact-resistant, non-corrosive, and compatible with solvent-weld joining methods. The material is lightweight and suitable for below-ground and above-ground use in residential and light commercial applications where compliance with ASTM D2661 is required.

Key Characteristics

• ✅ Material: ABS (Acrylonitrile Butadiene Styrene) for chemical and corrosion resistance
• ✅ Size: 4 inch spigot x 3 inch hub nominal reduction
• ✅ Wall Type: Schedule 40
• ✅ Joining Method: Solvent weld connection (compatible with ABS cement)
• ✅ Compliance: Manufactured to ASTM D2661 and CSA B181.1 specifications

Typical Applications

This reducing bushing is commonly installed in ABS DWV piping systems to facilitate transitions between 4-inch and 3-inch nominal pipe sizes. It is frequently used in waste stack terminations, vent connections, and branch line transitions, where dimensional adjustment is needed without modifying core pipe runs.

Installation Guidelines

Ensure that the bushing is inserted fully into a solvent-welded 4 inch hub fitting and joined using ABS solvent cement per manufacturer and ASTM D2855 procedures. The smaller 3 inch pipe should be seated into the bushing with proper bonding to ensure leak-free performance. Surface preparation and adherence to cure times are essential for joint integrity.

Material Performance Notes

ABS material is thermoplastic and not rated for hot water systems. It should not be exposed to direct sunlight for extended periods unless protected. Its resistance to mineral buildup and most household chemicals makes it well suited for DWV applications.

Use the 4 inch x 3 inch ABS DWV Bushing in code-compliant drainage layouts requiring reliable size reduction within Schedule 40 systems.