Westlake 429120 12″ Slip x Slip Coupling

Description

Westlake Pipe & Fittings 429120 12″ Slip x Slip Coupling

The Westlake Pipe & Fittings 429120 12″ Slip x Slip Coupling is a heavy-duty PVC fitting designed to connect two sections of 12-inch PVC pipe in large-diameter piping systems. With slip connections on both ends, it is intended for solvent-weld installation, forming a strong, permanent, and leak-resistant joint. This coupling is ideal for extending pipe runs, repairing damaged lines, or modifying system layouts while maintaining structural integrity and performance.

Manufactured from high-quality Schedule 40 PVC, the 429120 coupling offers excellent resistance to corrosion, rust, scaling, chemicals, moisture, and UV exposure. Unlike metal fittings, PVC maintains long-term durability in demanding indoor and outdoor environments. Despite its large diameter, the coupling remains lighter than metal alternatives, making handling and alignment more efficient during installation.

The precision-molded interior provides a smooth, unobstructed bore that promotes consistent water flow while minimizing turbulence and pressure loss. This supports efficient hydraulic performance and reduces strain on pumps and connected equipment. As a result, the coupling is well suited for municipal water distribution, industrial processing systems, commercial plumbing, irrigation infrastructure, stormwater management, and large pool or aquatic circulation applications.

Fully compatible with standard Schedule 40 PVC pipe and fittings, the 429120 integrates seamlessly into new construction, system expansions, and repair projects without the need for special adapters. Its durable construction, reliable solvent-weld connection, and efficient flow design make it an essential component for large-diameter PVC piping systems requiring dependable, long-term service.

Westlake Pipe & Fittings has earned its reputation as one of North America’s foremost manufacturers of PVC pipe and fittings, delivering reliable infrastructure solutions for municipal, plumbing, industrial, agricultural, irrigation, water-well, electrical, and pool/spa applications. Drawing on decades of industry experience and backed by the resources of a major global materials company, the firm manages a vast manufacturing and distribution network that ensures ready availability and regional supply across the continent. Its product portfolio spans an exceptional breadth — from pressure-rated PVC conduit and solvent-weld sewer and drainage pipes to gasket sewer fittings, high-strength PVCO pressure systems, injection-molded valves, CPVC hot-water fittings, and UV-resistant electrical conduits — enabling seamless integration into virtually any water, waste, or wiring infrastructure project. By employing cutting-edge PVC technologies such as Certa-Lok® restrained joints and molecular-oriented PVCO formulations, the company advances beyond conventional piping to offer enhanced joint stability, long-term durability, and superior resistance to corrosion, chemicals, and environmental stress. Every product reflects a commitment to sustainable construction practices, lightweight and cost-effective materials, and a design life measured in decades rather than years — reducing maintenance needs, lowering lifetime infrastructure costs, and enabling project planners to build with confidence. From small residential installations to large-scale municipal or commercial works, Westlake Pipe & Fittings stands out for its engineering rigor, full-system compatibility, and capacity to meet rigorous safety and performance standards. By combining versatile product lines, robust quality assurance, and a legacy of innovation, the company delivers piping solutions that support reliable water delivery, efficient drainage, robust electrical conduit, and long-term infrastructure integrity — providing professionals the dependable foundation needed for modern construction and utility projects.

Westlake Pipe & Fittings 429120 12″ Slip x Slip Coupling Features:

• Schedule 40 PVC construction for corrosion and chemical resistance
• Smooth internal bore supports efficient flow and reduced pressure loss
• Lightweight compared to metal fittings for easier installation
• Compatible with standard Schedule 40 PVC piping systems
• Ideal for municipal, industrial, commercial, irrigation, and aquatic applications

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