Female Adapter, Slip x FPT PVC Schedule 40 2-1/2" (435-025)

This 2-1/2" Schedule 40 PVC Female Adapter (Slip x FPT) provides a direct, reliable transition from a PVC socket pipe run to any standard 2-1/2" male NPT-threaded fitting, nipple, valve, pump port, or equipment connection in commercial and light industrial piping systems. Constructed in white Schedule 40 PVC, it offers the corrosion resistance and chemical compatibility required across a wide range of fluid handling applications at large-diameter pipe sizes where metal fittings would degrade or add unnecessary weight and cost to the assembly.

The slip socket end accepts a 2-1/2" PVC pipe for a permanent solvent-cement bond, while the FPT interior accepts any standard 2-1/2" male NPT-threaded pipe end, nipple, or fitting for a pressure-tight mechanical connection when made up with thread sealant or PTFE tape. This Slip x FPT configuration is the inverse of the male adapter (436 series) and serves a distinct transition function — where the male adapter terminates a PVC pipe run with a male thread that inserts into a female port, the female adapter terminates a PVC pipe run with a female thread that receives a male-threaded component. This makes the female adapter the correct choice when the downstream threaded component presents a male NPT end — such as a threaded nipple stub, pump discharge nipple, male-threaded valve stem, or male-threaded equipment connection — that must be received rather than engaged from the outside. At 2-1/2", this adapter is most commonly encountered in high-flow irrigation systems, large-diameter pump station assemblies, and distribution headers where this less common nominal size appears as part of a specific flow or velocity design requirement.

Rated to approximately 160 psi at 73°F (governed by the 2-1/2" slip end), this adapter is suited for standard commercial and light industrial water distribution and irrigation service within its pressure class. Its PVC composition provides excellent resistance to corrosion, scale buildup, chlorinated water, and a broad range of chemical exposures, making it a reliable long-term alternative to metal adapters in moisture-prone or chemically active environments. NSF/ANSI 61 listing confirms suitability for potable water contact.

Apply solvent cement to both the pipe end and fitting socket per ASTM D2564 procedures, using a primer appropriate for the pipe and fitting schedule. Insert pipe fully into the socket and maintain a quarter-turn during assembly for even cement distribution across the joint surface. On the FPT end, use a quality pipe thread sealant or PTFE tape on the male NPT threads of the mating component before engagement. Allow adequate cure time on the cemented joint before pressurizing the system, and derate pressure ratings for elevated temperatures per published derating curves.

Specifications:

Industries & Applications:

• Irrigation & Water Distribution — Terminates 2-1/2" PVC socket pipe runs at male-threaded pump discharge nipples, valve stems, filter housing inlets, and zone header connections in large-diameter agricultural and municipal irrigation systems where the downstream threaded component presents a male NPT end requiring a female-threaded socket adapter
• Industrial Process Piping — Transitions large-diameter PVC socket pipe runs to male-threaded pump inlets, valve bodies, flow meter connections, and equipment ports in water treatment, chemical processing, and manufacturing facilities where a female-threaded socket adapter is required at the pipe-to-thread interface
• Commercial Plumbing — Connects 2-1/2" Schedule 40 PVC socket distribution mains to male-threaded valves, pressure-reducing assemblies, and riser connections in commercial building water supply systems where the threaded component presents a male NPT stub or nipple at the connection point
• Chemical Handling — Provides a corrosion-resistant socket-to-female-thread transition in large-diameter systems conveying acids, caustics, fertilizer solutions, and other fluids incompatible with metal fittings, particularly at pump discharge nipples, male-threaded injection ports, and equipment interfaces where a receiving female thread is required at the pipe end
• Water Treatment & Aquaculture — Used at pump discharge connections, filter housing male-threaded inlets, and treatment equipment interfaces in recirculating and municipal water treatment systems where NSF/ANSI 61 compliance and a female-threaded socket transition are required at 2-1/2" pipe terminations
• HVAC & Mechanical Systems — Connects 2-1/2" PVC socket pipe runs to male-threaded pump ports, valve bodies, and equipment connections on cooling tower supply headers, chilled water distribution mains, and chemically treated water systems within the Schedule 40 pressure rating class