Description
Westlake Pipe & Fittings 435-025 Female Adapter, 2.5″ Slip x 2.5″ FPT
The Westlake Pipe & Fittings 435-025 Female Adapter is a precision-manufactured, Schedule 40 PVC fitting designed to provide a reliable transition between a solvent-weld (slip) connection and a female pipe thread (FPT) connection. This adapter is sized for 2.5″ nominal diameter — specifically 2½‐inch slip end and 2½‐inch female threaded end — allowing seamless integration of standard schedule 40 PVC systems into threaded pipe segments or components. According to manufacturer and distributor specifications, the part number 435-025 is frequently listed as “2-1/2″ Schedule 40 PVC Female Adapter, Slip × FPT” and is marketed under the Westlake brand (and often cross-referenced with other brands such as Spears/LASCO) for use in pressure piping systems.
Constructed from Type I, Grade 1 PVC (as governed by ASTM D1784) and manufactured in compliance with ASTM D2466 for injection-molded solvent-weld pressure PVC fittings, the 435-025 adapter is intended for use in non-metallic pressurized water piping systems, including potable water supply, irrigation, general industrial piping, and related applications.The body of the adapter features reinforced wall thickness in stress concentration zones, and a molded design optimized for internal pressure integrity and external mechanical durability.
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On the slip end, the inner socket receives a 2½″ nominal PVC pipe which is intended to be cemented (solvent-welded) into the adapter using an appropriate PVC solvent cement and primer per applicable codes and practices. On the other end, the female thread is a standard FPT bore (female pipe thread) machined into the fitting, allowing a threaded male pipe or component of nominal 2½″ size to be securely screwed in. The combination allows a clean, leak-resistant transition from a cemented PVC system to a threaded component with minimal use of additional couplings or bushings.
The adapter is rated for service at temperatures up to approximately 140 °F (60 °C) in typical applications, as indicated in product listings.Because it is built to Schedule 40 specifications, the design wall thickness corresponds to that standard for 2½″ PVC pipe/fittings (for example ~0.203″ wall thickness for certain cross-references) and is sized to match the flow and pressure performance of schedule 40 pipe of the same nominal diameter.The color is typically white, consistent with standard pressure PVC systems, making it suitable for visible installations or where aesthetic matching is important.
In summary, the Westlake Pipe & Fittings 435-025 Female Adapter, 2.5″ Slip x 2.5″ FPT, delivers durability, reliability, and versatility. Its corrosion-resistant Schedule 40 PVC construction, smooth interior, and precision engineering ensure professional-grade performance, efficient fluid flow, and secure, leak-resistant connections in any piping system.
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 435-025 Female Adapter, 2.5″ Slip x 2.5″ FPT Features:
- Durable, corrosion- and chemical-resistant Schedule 40 PVC construction
- Ideal for pools, spas, irrigation systems, industrial water lines, and municipal applications
- Used to connect two parts with two different end types
- Lightweight yet strong for easy handling and long-term reliability
- Provides leak-resistant, professional-grade connections between slip and threaded systems
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