Reducer Bushing, Spigot x FPT PVC Schedule 40 2-1/2" x 1-1/4" (438-290)

This 2-1/2" x 1-1/4" Schedule 40 PVC Reducer Bushing (Spigot x FPT) provides a compact, inline solution for transitioning a 2-1/2" socket-end fitting hub down to a 1-1/4" female-threaded connection in commercial and light industrial PVC piping systems. Constructed in white Schedule 40 PVC, it delivers the corrosion resistance and chemical compatibility required across a wide range of fluid handling applications where a large-diameter socket assembly must interface with a 1-1/4" male NPT-threaded valve, pump port, filter housing, or equipment connection without additional transition hardware.

The 2-1/2" spigot (male plain end) is sized to insert directly into the hub of any standard 2-1/2" socket-end fitting — tee, cross, coupling, elbow, or valve body — and is solvent-cemented in place to form a permanent, leak-free joint at the outer face. The 1-1/4" FPT interior accepts any standard 1-1/4" male NPT-threaded fitting, nipple, valve, or equipment connection, providing a direct large-diameter socket-to-thread transition in a single compact body. The 2-1/2" to 1-1/4" step-down is a moderate mid-range reduction within the 2-1/2" spigot inlet sub-series — less aggressive than the 5:1 reduction of the 438-287 (2-1/2" x 1/2") and suited to applications where the downstream threaded component requires a full intermediate-diameter 1-1/4" port rather than a small-bore instrument or service connection. This configuration is most commonly encountered where a 2-1/2" socket distribution main must supply a 1-1/4" threaded zone valve, pump inlet, filter housing connection, or moderate-flow branch service line directly off a tee or cross branch outlet without an intermediate all-socket reducer and separate threaded adapter in the assembly. Where the all-solvent-cement Spigot x Slip counterpart (437 series) serves the same transition into a 1-1/4" socket pipe run, this Spigot x FPT configuration is the correct choice when the downstream component presents a 1-1/4" male NPT thread.

Rated to 160 psi at 73°F (governed by the 2-1/2" spigot end), this bushing 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 reducing bushings in moisture-prone or chemically active environments. NSF/ANSI 61 listing confirms suitability for potable water contact.

Apply solvent cement to the spigot exterior and the interior of the receiving 2-1/2" socket hub per ASTM D2564 procedures, inserting fully and holding briefly for initial set. On the 1-1/4" FPT end, use a quality pipe thread sealant or PTFE tape on all male NPT threads before engagement. Avoid over-torquing — PVC threads require hand-tight plus one to two turns; excessive force can crack the fitting. Allow adequate cure time on the cemented spigot joint before pressurizing the system, and derate pressure ratings for elevated temperatures per published derating curves.

Specifications:

Industries & Applications:

• Irrigation & Water Distribution — Transitions 2-1/2" socket-end mainline tees, crosses, and manifold assemblies to 1-1/4" male-threaded control valves, pump inlets, filter housing connections, and moderate-flow zone supply branches in large-diameter agricultural and municipal irrigation systems where 1-1/4" threaded components serve as the primary intermediate branch connection size at 2-1/2" socket mainline assemblies
• Industrial Process Piping — Interfaces 2-1/2" socket PVC assemblies with 1-1/4" male-threaded pump inlets, valve bodies, flow meters, and equipment ports in water treatment, chemical processing, and manufacturing facilities where a mid-range socket-to-thread transition connects a large-diameter distribution main to a standard intermediate-size threaded equipment connection in a single compact fitting body
• Commercial Plumbing — Connects 2-1/2" socket-end distribution assemblies to 1-1/4" male-threaded valves, branch supply risers, and equipment feed connections in commercial building water supply systems where a large-diameter socket main must interface with 1-1/4" threaded intermediate service components at branch or termination points
• Chemical Handling — Provides a corrosion-resistant, mixed-connection mid-range reduction in systems conveying acids, caustics, fertilizer solutions, and other fluids incompatible with metal fittings, particularly at pump inlets, valve station connections, and chemical feed equipment interfaces where 2-1/2" socket PVC pipe must transition to 1-1/4" male-threaded components without a multi-piece transition assembly
• Water Treatment & Aquaculture — Used at filter housing inlets, pump suction connections, treatment equipment interfaces, and recirculating system manifold ports where a 2-1/2" socket assembly must transition to a 1-1/4" male-threaded component and NSF/ANSI 61 compliance is required throughout the system
• HVAC & Mechanical Systems — Connects 2-1/2" socket-end PVC assemblies to 1-1/4" 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