Reducing Female Adapter, Slip x FPT PVC Schedule 40 1" x 3/4" (435-131)

This 1" x 3/4" Schedule 40 PVC Reducing Female Adapter (Slip x FPT) combines a pipe-size reduction and a socket-to-female-thread transition into a single compact fitting body, accepting a 1" PVC pipe run at the slip socket inlet and providing a 3/4" female NPT thread at the outlet — eliminating the need for a separate full-size female adapter plus an inline hex bushing or reducer coupling at the same assembly location. 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" socket pipe run must terminate at a 3/4" female-threaded receptacle for connection to a 3/4" male-threaded pump port, valve body outlet, solenoid valve inlet, equipment connection, or threaded pipe run without additional transition hardware.

The 1" slip socket accepts 1" PVC pipe for a permanent solvent-cement bond, maintaining the upstream pipe diameter at the socket inlet. The 3/4" FPT outlet accepts any standard 3/4" male NPT-threaded pipe end, nipple, valve body outlet, pump connection, solenoid valve inlet, or equipment port for a pressure-tight mechanical connection when made up with thread sealant or PTFE tape. This reducing Slip x FPT configuration makes the fitting the correct single-fitting solution when a 1" socket distribution run must connect to a 3/4" male-threaded system component — combining the size reduction and the socket-to-female-thread transition that a standard full-size 1" female adapter plus a 1" x 3/4" threaded hex bushing would otherwise require at the same pipe run termination point. The female adapter provides a female-threaded receptacle that receives a male-threaded component — distinct from the reducing male adapter (436 series, MPT x Slip), which provides a male-threaded outlet for threading into a female-threaded port; the correct choice between them is determined entirely by the thread orientation of the downstream component. The 1" to 3/4" step-down is a modest 1.33:1 near-full-size reduction — the smallest practical adjacent-size step-down at this inlet diameter — driven primarily by the need to match a 3/4" male-threaded downstream component rather than by any hydraulic flow management requirement; most commonly encountered at pump station connections, valve body male-threaded inlets, irrigation zone valve connections, and equipment male-threaded ports where a 1" socket supply run must interface with a 3/4" male-threaded component in the most compact possible single-fitting assembly.

Rated to approximately 450 psi at 73°F (governed by the 1" slip end), this adapter is suited for standard commercial and light industrial water distribution and irrigation service within its pressure class. 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 3/4" 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 — PVC threads require hand-tight plus one to two turns. 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" PVC socket supply runs at 3/4" male-threaded zone control valves, pump inlets, filter housing connections, and solenoid valve bodies in agricultural and municipal irrigation systems where the downstream threaded component is specified at 3/4" while the upstream socket run is built to 1" — combining both the size reduction and thread transition in a single compact fitting at valve station and distribution manifold connection points
• Pump Station Assemblies — Provides a 3/4" female-threaded receptacle at 1" socket pump suction and discharge pipe run terminations in pump station installations where the pump body, valve, or equipment presents a 3/4" male NPT thread at the pipe-to-equipment interface — combining size reduction and thread transition in a single fitting body at the most common adjacent-size pump connection reduction
• Commercial Plumbing — Connects 1" Schedule 40 PVC socket distribution runs to 3/4" male-threaded valves, pressure-reducing assemblies, and equipment feed connections in commercial building water supply systems where a single reducing female adapter replaces a full-size adapter plus a separate hex bushing at the pipe-to-thread transition point
• Industrial Process Piping — Transitions 1" socket PVC pipe runs to 3/4" male-threaded pump inlets, valve bodies, flow meters, and equipment ports in water treatment, chemical processing, and manufacturing facilities where a compact single-fitting near-full-size reducing thread transition minimizes fitting count at the pipe-to-equipment interface
• Chemical Handling — Provides a corrosion-resistant combined near-full-size reducing and socket-to-female-thread transition in systems conveying acids, caustics, fertilizer solutions, and other fluids incompatible with metal fittings, at pump inlets, valve stations, and chemical feed equipment interfaces where 1" socket PVC must connect to 3/4" male-threaded components in a single compact body
• Water Treatment & Aquaculture — Used at pump connection points, filter housing male-threaded inlets, and treatment equipment interfaces where a 1" socket pipe run must terminate at a 3/4" female-threaded receptacle accepting a male NPT component and NSF/ANSI 61 compliance is required throughout the system