Dura Plastic 437-337BC Pvc Reducing Coupling Sch 40

Product Description

The DURA PLASTIC 437-337BC is a Schedule 40 PVC reducing coupling designed for joining pipes of two different diameters in a single inline connection. It features a 3-inch spigot end and a 1.5-inch socket end, allowing a direct transition between pipe sizes without additional adapters. PVC construction makes this fitting suitable for cold and ambient-temperature water service, drain and waste lines, and irrigation systems. Licensed plumbers and pipefitters install this type of fitting in both residential and light commercial applications where a permanent, solvent-welded reduction is required.

This reducing coupling is used in Schedule 40 PVC piping systems where a 3-inch main line steps down to a 1.5-inch branch or outlet. Typical install scenarios include domestic water distribution, pool and spa plumbing, irrigation mainlines, and drain-waste-vent systems where a reduction in pipe diameter is needed at a junction point. The spigot end slides into a standard 3-inch socket fitting or valve, while the socket end accepts a standard 1.5-inch spigot pipe or fitting.

Key Features

• Schedule 40 PVC construction for pressure-rated service in standard plumbing systems
• 3-inch spigot x 1.5-inch socket end configuration enables inline pipe size reduction
• Solvent-weld end style provides a permanent, leak-free joint when properly cleaned and primed
• Domestic manufacture
• Compatible with standard Schedule 40 PVC pipe and fittings of matching nominal sizes

Compatibility

Designed as an OEM-style replacement or new-installation fitting for Schedule 40 PVC piping systems using 3-inch and 1.5-inch nominal pipe sizes with solvent-weld connections.

Installation Notes

Installation is performed by licensed plumbers or qualified pipefitters following IPC and local plumbing code requirements. Shut off the water supply and depressurize the line before cutting into an existing system. Clean and deburr all pipe ends, apply approved PVC primer, then solvent cement before joining. Allow full cure time per the cement manufacturer instructions before pressurizing the system.

Technical Specifications

• Material: PVC
• Schedule: SCH 40
• Nominal Size: 3 inches x 1.5 inches
• End Style: Spigot x Socket
• Origin: Domestic

Standard Information

• Brand: DURA PLASTIC
• Manufacturer Part Number: 437-337BC