Westlake Pipe & Fittings 438422 4″ x 3″ Spigot x FPT Reducing Bushing

Description

Westlake Pipe & Fittings 438422 4″ x 3″ Spigot x FPT Reducing Bushing

The Westlake Pipe & Fittings 438422 4″ x 3″ Reducing Bushing is a high-quality PVC fitting designed to provide a dependable and efficient transition between different pipe sizes and connection types within a wide range of piping systems. Engineered for strength, dimensional accuracy, and long-term performance, this reducing bushing allows a 4-inch spigot connection to be reduced down to a 3-inch female pipe thread (FPT) connection, making it an essential component in plumbing, irrigation, pool and spa, and industrial fluid-handling applications.

This reducing bushing is specifically intended for situations where a larger hub or socket must be adapted to accept a smaller threaded component. The spigot end is sized to fit directly into a compatible 4-inch socket fitting using solvent cement, creating a permanent and secure joint. The opposite end features a precision-molded 3-inch female pipe thread that allows threaded connection to male-threaded pipes, valves, or equipment. This dual-function design provides flexibility during installation and simplifies system layout by reducing the need for multiple fittings.

Manufactured from durable PVC (polyvinyl chloride), the Westlake 438422 bushing offers excellent resistance to corrosion, rust, scaling, and chemical attack. Unlike metal fittings, PVC does not degrade when exposed to moisture or many commonly used chemicals, making it ideal for both indoor and outdoor installations. Its lightweight construction also makes handling and installation easier, particularly in large-diameter piping systems where weight can be a concern.

The reducing bushing is produced to Schedule 40 dimensional standards, ensuring compatibility with standard Schedule 40 PVC pipe and fittings. This consistency is critical for installers who require predictable fit, reliable solvent welds, and secure threaded connections. The smooth internal surfaces of the bushing help minimize flow restriction and turbulence, contributing to efficient fluid movement through the system and reducing the likelihood of buildup over time.

One of the key advantages of this spigot x FPT reducing bushing is its versatility. In plumbing systems, it is commonly used to connect large-diameter drain, waste, or supply lines to smaller threaded components such as cleanouts, valves, or specialty fittings. In irrigation systems, it allows large mainlines to be reduced to threaded control components, helping maintain system efficiency while accommodating different equipment sizes. Pool and spa installations also benefit from this fitting, as it enables secure threaded connections to pumps, filters, heaters, and other equipment while maintaining strong solvent-welded joints on the pipe side.

The female pipe thread end is molded to industry-standard NPT specifications, allowing for proper thread engagement and a tight seal when used with compatible male-threaded components. When installed correctly using appropriate thread sealant or PTFE tape, the FPT connection provides a reliable, leak-resistant joint that can be disassembled if future maintenance or system modifications are required. This combination of a permanent solvent-weld spigot end and a serviceable threaded end offers an ideal balance between durability and flexibility.

The long-lasting performance of the Westlake 438422 reducing bushing makes it suitable for residential, commercial, and light industrial environments. Its white finish is standard for PVC pressure fittings, making it easy to visually inspect and identify within a piping system. Additionally, PVC’s inherent resistance to UV exposure (when properly protected) and temperature fluctuations helps ensure dependable operation over extended periods.

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 438422 4″ x 3″ Spigot x FPT Reducing Bushing Features:

• Female threaded end enables easy connection to male-threaded components
• Suitable for plumbing, irrigation, pool & spa, and industrial applications
• Durable PVC construction for corrosion and chemical resistance
• Reduces 4″ spigot connection to 3″ female pipe thread (FPT)
• Lightweight design for easy handling and installation
• Spigot end allows secure solvent-weld installation
• Designed to Schedule 40 dimensional standards
• Smooth internal surfaces for efficient flow

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