Westlake Pipe & Fittings 429-040 Coupling, 4″ Slip x 4″ Slip

Description

Westlake Pipe & Fittings 429-040 Coupling, 4″ Slip x 4″ Slip

The Westlake Pipe & Fittings 429-040 Coupling, 4″ Slip x 4″ Slip, is a high-quality PVC fitting designed to join two 4-inch Schedule 40 PVC pipes in a seamless, leak-resistant connection. Engineered for durability and professional-grade performance, this coupling is ideal for plumbing, irrigation, pool and spa systems, industrial piping, and municipal water applications. Whether you are installing a new pipeline, repairing a damaged section, or extending an existing system, the 429-040 Coupling ensures a strong and reliable connection.

Constructed from premium Schedule 40 PVC, the coupling offers excellent resistance to corrosion, chemical exposure, and UV degradation, making it suitable for both indoor and outdoor applications. Unlike metal fittings, this PVC coupling will not rust, scale, or deteriorate over time, providing long-lasting performance and minimal maintenance. Its robust construction allows it to withstand high-pressure water flow, temperature fluctuations, and everyday wear, making it a dependable choice for residential, commercial, and industrial installations.

The 4-inch slip connection on both ends is designed for simple, secure bonding with standard 4-inch PVC pipe. Installation is straightforward: apply PVC primer and solvent cement to both the pipe ends and the coupling, then insert the pipes into the coupling to form a tight, watertight seal. The smooth interior ensures minimal turbulence, maintaining consistent water flow and system efficiency. This is especially important in high-demand applications, such as pool return lines, spa circulation systems, irrigation distribution networks, and industrial water transfer systems.

The Westlake 429-040 Coupling is highly versatile and can be used in a variety of applications. It is ideal for joining sections of pipe during new construction, extending pipelines in existing systems, or replacing damaged sections without the need for complex adapters. Its compact, lightweight design allows for easy handling and placement in tight spaces while maintaining the structural integrity of the pipeline.

Professionals trust Westlake for precision manufacturing, ensuring that each coupling provides an accurate fit with all standard Schedule 40 PVC piping. This tight dimensional accuracy reduces the risk of leaks, misalignment, or system failure, delivering a reliable, long-lasting connection that keeps your plumbing, irrigation, or industrial system running smoothly. Its durability, ease of installation, and reliable performance make it a key component for any PVC piping system.

Whether used in pools, spas, irrigation, or industrial fluid transfer, the 429-040 Coupling is engineered to meet the highest standards of quality and dependability. Its smooth interior, corrosion-resistant PVC material, and professional-grade design make it a trusted choice for contractors, maintenance technicians, and DIY installers who require a secure and efficient pipe connection.

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 429-040 Coupling, 4″ Slip x 4″ Slip Features:

• Durable, corrosion- and chemical-resistant Schedule 40 PVC
• Smooth interior maintains consistent flow and minimizes turbulence
• Easy installation with PVC primer and solvent cement
• Ideal for pools, spas, irrigation systems, industrial water lines, and municipal applications
• Lightweight and compact for easy handling and placement