Westlake Pipe & Fittings 429-422 Reducer Coupling, 4″ Socket x 3″ Socket

$22.00

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  • 4″ Socket x 3″ Socket configuration for reducing pipe size
  • Ideal for plumbing, irrigation, and industrial applications
  • Slip x slip ends for easy solvent weld installation
  • Conforms to ASTM D1784 standards
  • Rated for temperatures up to 140°F

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SKU: LAS-56-4135 Category:

Description

Westlake Pipe & Fittings 429-422 Reducer Coupling, 4″ Socket x 3″ Socket

The Westlake Pipe & Fittings 429-422 Reducer Coupling, 4″ Socket x 3″ Socket, is a high-quality PVC fitting designed to seamlessly connect two pipes of different diameters. Ideal for plumbing, irrigation, pool, and water management systems, this reducer coupling provides a secure and efficient transition between a 4-inch pipe and a 3-inch pipe. Constructed from durable Schedule 40 PVC, the 429-422 ensures long-lasting performance and reliability in a variety of residential, commercial, and industrial applications.

Featuring a 4-inch socket end and a 3-inch socket end, this reducer coupling allows for a smooth reduction between larger and smaller piping systems. The socket design provides a tight, slip-fit connection for both pipe sizes, eliminating the need for threaded adapters while maintaining a secure, leak-resistant seal. This fitting is ideal for adapting existing pipelines, downsizing flow lines, or connecting mismatched PVC pipes in complex plumbing setups, ensuring water flows efficiently and reliably throughout the system.

The durable PVC construction offers excellent resistance to corrosion, chemicals, and UV exposure, making the 429-422 reducer coupling suitable for both indoor and outdoor applications. Its smooth interior surface reduces friction and turbulence, maintaining consistent water flow and system pressure. The robust material ensures long-term durability and dependable performance, even under demanding conditions such as high-pressure irrigation systems, pool and spa plumbing, or commercial water management networks.

Installation is quick and straightforward. The slip-fit design allows pipes to be easily inserted into each end of the coupling and bonded with standard PVC cement. This ensures a strong, permanent seal while simplifying assembly and minimizing potential leak points. Its lightweight yet sturdy design also makes handling and positioning easier during installation, saving time and effort for both professional plumbers and DIY homeowners.

The Westlake 429-422 Reducer Coupling is a versatile and essential component for any plumbing or irrigation system. It allows for efficient size transitions, protects system integrity, and supports smooth water flow. Whether you are performing repairs, upgrades, or new installations, this coupling provides a professional-grade solution that enhances the reliability and functionality of your piping system.

By incorporating the 429-422 reducer coupling into your project, you can achieve secure, long-lasting connections between 4-inch and 3-inch pipes, reduce leak risks, and ensure optimal system performance. Westlake’s commitment to quality ensures this fitting delivers dependable service for years, making it a trusted choice for professionals and homeowners alike.

Westlake Pipe & Fittings is dedicated to helping contractors maximize efficiency and helping engineers design systems that entire communities can rely on.With manufacturing & distribution centers across North America, dedicated sales, technical services, specification engineers and customer support teams, our unparalleled service allows you to design, specify and install complete projects with confidence.

Westlake Pipe & Fittings 429-422 Reducer Coupling, 4″ Socket x 3″ Socket Features:

  • Schedule 40 PVC construction for durability and corrosion resistance
  • Long-body design enhances sealing and structural integrity
  • 4″ Socket x 3″ Socket configuration for reducing pipe size
  • Ideal for plumbing, irrigation, and industrial applications
  • Slip x slip ends for easy solvent weld installation
  • Conforms to ASTM D1784 standards
  • Rated for temperatures up to 140°F
  • NSF-certified for potable water use

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Additional information

Weight .82 lbs
Dimensions 4 × 3 × 3 in
Brand

Plumbing Accessories

Adapters

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