Female Adapter, Slip x FPT PVC Schedule 40 1-1/4" (435-012)

This 1-1/4" Schedule 40 PVC Female Adapter (Slip x FPT) provides a direct transition from a 1-1/4" PVC socket pipe run to a 1-1/4" female NPT-threaded outlet, combining a solvent-cement socket inlet and a female-threaded outlet in a single compact fitting body. Constructed in white Schedule 40 PVC, it offers the corrosion resistance and chemical compatibility required across a wide range of commercial plumbing, irrigation, and light industrial applications where a 1-1/4" socket pipe run must terminate at a female-threaded receptacle for connection to a male-threaded valve, pump, nipple, equipment port, or threaded pipe run without introducing additional transition hardware.

The 1-1/4" slip socket inlet accepts 1-1/4" PVC pipe for a permanent solvent-cement bond, anchoring the fitting to the upstream socket distribution assembly. The 1-1/4" FPT outlet accepts any standard 1-1/4" male NPT-threaded pipe end, nipple, valve body outlet, pump connection, or equipment port for a pressure-tight mechanical connection when made up with thread sealant or PTFE tape. This Slip x FPT configuration is the standard approach to transitioning from a 1-1/4" socket pipe run into a female-threaded receptacle — the correct choice whenever the downstream component presents a male NPT thread that must seat into a female port rather than threading over one. The female adapter is the functional inverse of the 1-1/4" male adapter (436-012 if stocked) — where the 436-012 provides a male-threaded outlet off a socket run for threading into a female-threaded port, the 435-012 provides a female-threaded outlet off a socket run for receiving a male-threaded component; the correct choice between them is determined entirely by the thread orientation of the downstream component. At 1-1/4", this adapter most commonly appears at pump suction and discharge male-threaded connections, valve body male-threaded inlets, filter housing male-threaded ports, and distribution manifold male-threaded stubs where the downstream component presents a male NPT thread and the upstream pipe run is all-socket PVC Schedule 40 — an intermediate distribution diameter widely specified in commercial irrigation sub-mains, commercial plumbing branch supply headers, and light industrial process water distribution assemblies.

Rated to approximately 370 psi at 73°F (governed by the 1-1/4" 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, 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. On the 1-1/4" FPT end, use a quality pipe thread sealant or PTFE tape on the male NPT threads of the mating downstream component before engagement. Avoid over-torquing the mating male threaded component — PVC female threads at 1-1/4" can crack under excessive torque applied through the mating male component. 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 1-1/4" PVC socket sub-main and secondary distribution pipe runs at pump discharge male-threaded connections, filter housing male-threaded inlets, valve body male-threaded outlets, and zone manifold male-threaded stubs in agricultural and municipal irrigation systems where the downstream component presents a male NPT thread requiring a female-threaded receptacle at the end of the all-socket 1-1/4" pipe run
• Commercial Plumbing — Transitions 1-1/4" socket PVC distribution mains to female-threaded receptacles at pump connections, valve body male-threaded inlets, equipment male-threaded ports, and riser connection points in commercial building water distribution systems where the downstream threaded component requires a female-threaded socket at the 1-1/4" pipe run termination
• Pump Station Assemblies — Provides female-threaded receptacles at 1-1/4" socket pump suction and discharge pipe run terminations, bypass line male-threaded stubs, and valve station male-threaded inlet connections in pump station installations where the pump body, valve, or equipment presents a male NPT thread at the 1-1/4" pipe-to-equipment interface
• Industrial Process Piping — Transitions 1-1/4" socket process water distribution pipe runs to female-threaded receptacles at pump inlets, valve body male-threaded connections, flow meter male-threaded ports, and equipment interfaces in water treatment, chemical processing, and manufacturing facilities where the all-socket downstream assembly must receive male-threaded process equipment connections at the 1-1/4" distribution diameter
• Water Treatment & Aquaculture — Used at pump suction connections, filter housing male-threaded inlets, treatment equipment male-threaded ports, and recirculating system male-threaded component interfaces where a 1-1/4" socket pipe run must terminate at a female-threaded receptacle with NSF/ANSI 61 compliance required throughout the assembly
• HVAC & Mechanical Systems — Transitions 1-1/4" socket PVC pipe runs to female-threaded receptacles at pump connections, cooling tower male-threaded supply inlets, chilled water distribution equipment male-threaded ports, and chemically treated water system component interfaces within the Schedule 40 pressure class