Description
Westlake Pipe & Fittings 439212 1.5″ MPT x 1.25″ FPT PVC Threaded Bushing
The Westlake Pipe & Fittings 439212 1.5″ MPT x 1.25″ FPT PVC Bushing is a precision-molded reducing bushing designed to provide a reliable and efficient transition between two different threaded pipe sizes within PVC piping systems. Engineered for durability, compatibility, and long-term performance, this threaded bushing is an essential component for professionals and system designers working in plumbing, irrigation, pool and spa, and general fluid handling applications.
This fitting is specifically designed with a 1.5-inch male pipe thread (MPT) on the exterior and a 1.25-inch female pipe thread (FPT) on the interior, allowing it to reduce a larger threaded opening to a smaller threaded connection without compromising structural integrity or sealing performance. By eliminating the need for multiple adapters or custom solutions, the Westlake 439212 simplifies installation while maintaining a secure, leak-resistant joint.
Manufactured from high-grade PVC (polyvinyl chloride), this threaded bushing offers excellent resistance to corrosion, chemical attack, scaling, and environmental degradation. Unlike metal bushings, PVC will not rust, pit, or corrode when exposed to moisture or many common chemicals, making it an ideal material for both indoor and outdoor installations. The lightweight nature of PVC also makes handling and installation easier, especially in tight or elevated spaces.
PVC is well known for its smooth internal surfaces, which help reduce friction losses and prevent buildup inside the piping system. This contributes to efficient fluid flow and helps maintain consistent system performance over time. The material’s inherent durability ensures that the bushing maintains its shape and thread integrity even under repeated assembly and disassembly.
The Westlake 439212 features precisely molded threads that conform to standard NPT (National Pipe Thread) specifications. The external 1.5″ male threads are designed to thread smoothly into compatible female fittings, while the internal 1.25″ female threads accept smaller male threaded components with a secure and dependable fit.
This dual-threaded configuration makes the bushing ideal for applications where pipe sizes must be reduced without altering the overall system layout. When properly installed with appropriate thread sealant or PTFE tape, the bushing provides a tight, leak-resistant seal capable of handling typical pressure requirements associated with Schedule 40 PVC systems.
Installation of the Westlake 439212 threaded bushing is straightforward and efficient. The bushing threads directly into a 1.5″ female threaded opening, instantly reducing it to a 1.25″ female threaded connection. This eliminates unnecessary steps and reduces labor time during installation.
Because the fitting is fully threaded rather than solvent-welded, it allows for easier maintenance, inspection, or future system modifications. Components can be removed or replaced without cutting pipe, making this bushing particularly useful in systems that may require periodic servicing.
Designed for long service life, the Westlake 439212 PVC threaded bushing resists wear caused by water pressure, vibration, and temperature variations commonly encountered in plumbing and irrigation systems. Its non-metallic construction helps extend system longevity while minimizing maintenance costs over time.
Whether used in a new installation or as part of a retrofit or repair, this threaded bushing provides a dependable solution for reducing pipe size while maintaining system integrity and performance.
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 439212 1.5″ MPT x 1.25″ FPT PVC Threaded Bushing Features:
- 1.5″ male pipe thread (MPT) x 1.25″ female pipe thread (FPT) configuration
- Suitable for plumbing, irrigation, pool & spa, and industrial applications
- Precision-molded NPT threads for secure, leak-resistant connections
- Durable PVC construction for corrosion and chemical resistance
- Allows easy disassembly for maintenance or system changes
- Ideal for reducing threaded pipe sizes in PVC systems
- Compatible with Schedule 40 PVC piping and fittings
- Lightweight design for easy handling and installation
Pool Warehouse
America's Favorite Pool Store, building backyard dreams since 1996!


Reviews
There are no reviews yet.