Male Adapter, MPT x Slip PVC Schedule 40 1-1/4" (436-012)

This 1-1/4" Schedule 40 PVC Male Adapter (MPT x Slip) provides a direct transition from a 1-1/4" PVC socket pipe run to a 1-1/4" male NPT-threaded outlet, combining a solvent-cement socket inlet and a male-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 male-threaded outlet for connection into a female-threaded valve, pump body, equipment port, filter housing, or fitting without introducing additional transition hardware at the pipe run end.

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" MPT outlet threads directly into any standard 1-1/4" FPT or FIP female-threaded valve body inlet, pump port, equipment connection, manifold female-threaded port, or tee branch FPT outlet for a pressure-tight mechanical connection when made up with thread sealant or PTFE tape. This MPT x Slip configuration is the standard approach to terminating a 1-1/4" socket pipe run at a female-threaded receptacle — the correct choice whenever the downstream port is a female-threaded connection requiring a male thread to seat into it. The male adapter is the functional inverse of the 1-1/4" female adapter (435-012 confirmed in this catalog session) — where the 435-012 provides a female-threaded outlet for receiving a male-threaded component off a socket run, the 436-012 provides a male-threaded outlet for threading into a female-threaded port off the same socket run; the correct choice between them is determined entirely by whether the downstream connection is a female-threaded port (receiving — use 436-012 MPT) or a male-threaded component (presenting — use 435-012 FPT). At 1-1/4", the male adapter should not be confused with the confirmed reducing variant 436-132 (1-1/4" Slip x 1" MPT), which shares the same 1-1/4" slip inlet but steps down to a smaller 1" MPT outlet — 436-012 maintains the full 1-1/4" diameter at both ends while 436-132 reduces to 1" at the threaded outlet. At 1-1/4", this adapter most commonly appears at pump suction and discharge female-threaded connections, valve body FPT inlets, filter housing female-threaded ports, and distribution manifold female-threaded entry ports where the upstream pipe run is all-socket 1-1/4" PVC and the downstream female-threaded port must receive a male thread — the standard pipe-to-equipment male-threaded transition at the most widely specified intermediate mainline diameter in commercial irrigation sub-mains and commercial plumbing branch supply headers.

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" MPT end, use a quality pipe thread sealant or PTFE tape before threading into the receiving female port. Avoid over-torquing — PVC male threads at 1-1/4" can crack the fitting body if excessive torque is applied at engagement or if the receiving female threads are overtightened against the fitting shoulder. 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 female-threaded ports, filter housing FPT inlets, valve body female-threaded connections, and zone manifold female-threaded entry ports in agricultural and municipal irrigation systems where the downstream female-threaded port must receive a male NPT thread at the end of the all-socket 1-1/4" pipe run
• Commercial Plumbing — Transitions 1-1/4" socket PVC distribution mains to male-threaded terminals at pump body female-threaded connections, valve body FPT inlets, equipment female-threaded ports, and riser connection points in commercial building water distribution systems where the downstream female-threaded port requires a male-threaded fitting at the pipe run termination
• Pump Station Assemblies — Provides male-threaded terminals at 1-1/4" socket pump suction and discharge pipe run terminations, bypass line female-threaded ports, and valve station FPT inlet connections in pump station installations where the pump body, valve, or equipment presents a female-threaded port at the 1-1/4" pipe-to-equipment interface requiring a male thread
• Industrial Process Piping — Transitions 1-1/4" socket process water distribution pipe runs to male-threaded terminals at pump FPT inlets, valve body female-threaded connections, flow meter female-threaded ports, and equipment interfaces in water treatment, chemical processing, and manufacturing facilities where all-socket downstream assemblies must deliver a male thread to female-threaded process equipment connections
• Water Treatment & Aquaculture — Used at pump suction connections, filter housing FPT inlets, treatment equipment female-threaded ports, and recirculating system female-threaded component interfaces where a 1-1/4" socket pipe run must terminate at a male-threaded connection with NSF/ANSI 61 compliance required throughout the assembly
• Chemical Handling — Provides a corrosion-resistant socket-to-male-thread transition at 1-1/4" pipe run terminations in chemical distribution assemblies and pump station socket piping conveying acids, caustics, fertilizer solutions, and other fluids incompatible with metal adapters where the downstream female-threaded equipment or manifold port must receive a male NPT thread off the all-socket pipe run