Description
Westlake Pipe & Fittings 439131 1″ x 0.75″ MPT x FPT Threaded Bushing
The Westlake Pipe & Fittings 439131 1″ x 0.75″ Threaded Bushing is a precision-molded PVC fitting designed to provide a reliable and efficient solution for reducing threaded pipe connections in a wide range of plumbing, irrigation, industrial, and fluid-handling systems. This threaded bushing allows installers to transition smoothly from a 1-inch female threaded opening to a 3/4-inch male threaded connection, making it an essential component when adapting pipe sizes without redesigning an entire system.
Manufactured by Westlake Pipe & Fittings, a recognized leader in thermoplastic piping systems, this bushing reflects the company’s commitment to dimensional accuracy, material consistency, and long-term performance. It is engineered to meet the practical demands of both professional installers and maintenance technicians who require dependable fittings that integrate seamlessly with standard PVC piping systems.
Threaded bushings play a critical role in piping systems by allowing size reduction while maintaining a secure, threaded connection. The Westlake 439131 bushing is specifically designed to reduce from 1″ female pipe thread (FPT) to 0.75″ male pipe thread (MPT). This configuration is commonly required when connecting smaller valves, gauges, pumps, or threaded adapters to larger threaded fittings or equipment ports.
Rather than using multiple fittings or complex transitions, this single bushing provides a compact, efficient solution. Its threaded design enables straightforward installation and removal, making it ideal for systems where future maintenance, upgrades, or component replacements may be required.
The 439131 threaded bushing is molded from high-quality PVC (polyvinyl chloride), a material widely used in piping systems due to its excellent resistance to corrosion, chemicals, and environmental degradation. Unlike metal fittings, PVC does not rust, pit, or scale, which helps preserve flow efficiency and ensures long service life even in demanding applications.
PVC’s inherent strength-to-weight ratio allows this bushing to remain lightweight while still providing the structural integrity needed for pressure-rated systems. The rigid construction maintains thread shape and alignment, ensuring a tight and consistent fit with mating components. Additionally, the smooth molded finish helps reduce stress concentrations that could otherwise compromise the fitting over time.
Both the male and female threads on the Westlake 439131 bushing are manufactured to standard NPT (National Pipe Thread) specifications. This ensures compatibility with a wide variety of threaded PVC, CPVC, and compatible thermoplastic fittings commonly used in plumbing and industrial systems.
The female threaded side accepts a 1-inch male threaded pipe or fitting, while the male threaded side inserts into a 3/4-inch female threaded port. When installed correctly with appropriate thread sealant or PTFE tape, the bushing creates a secure, leak-resistant joint capable of handling typical operating pressures associated with Schedule 40 PVC systems.
The threaded design also allows for controlled tightening without excessive force, reducing the risk of cracking or thread damage. This makes the fitting especially useful in applications where precision and reliability are critical.
Installation of the Westlake 439131 threaded bushing is quick and straightforward. Because it relies solely on threaded connections, no solvent cement or curing time is required. This is particularly beneficial in situations where systems must be assembled or repaired rapidly, or where solvent welding is impractical.
The compact form factor of the bushing allows it to fit easily into tight spaces, such as pump housings, manifolds, control panels, or equipment enclosures. Its lightweight nature also simplifies handling during installation, reducing installer fatigue on large projects.
Additionally, threaded connections provide the flexibility to disassemble the system if adjustments are needed. This makes the bushing well-suited for temporary setups, test assemblies, or systems that may require periodic reconfiguration.
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 439131 1″ x 0.75″ MPT x FPT Threaded Bushing Features:
- Reduces 1″ female pipe thread (FPT) to 0.75″ male pipe thread (MPT)
- Precision-molded NPT threads for secure, leak-resistant connections
- Ideal for plumbing, irrigation, pool, spa, and industrial applications
- Durable PVC construction for corrosion and chemical resistance
- Threaded design allows easy removal and system modification
- Lightweight yet strong for easy handling and installation
- Compatible with Schedule 40 PVC piping systems
- Suitable for new installations, repairs, and retrofits
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