Reducer Bushing, Spigot x Slip PVC Schedule 40 1-1/4" x 1" (437-168)

This 1-1/4" x 1" Schedule 40 PVC Reducer Bushing (Spigot x Slip) provides a compact, all solvent-cement near-full-size transition from a 1-1/4" socket fitting hub down to a continuing 1" socket pipe run — consolidating a very modest 1.25:1 step-down and the hub-to-pipe transition into a single all-socket fitting body driven almost entirely by downstream pipe run diameter compatibility rather than any hydraulic flow management requirement. Constructed in white Schedule 40 PVC, it offers reliable performance in commercial plumbing, irrigation, and light industrial installations where a 1" socket pipe run must originate directly at a 1-1/4" socket fitting hub in all-socket cemented construction throughout — the most minimal practical all-socket hub reduction at this inlet diameter.

The 1-1/4" spigot (male plain end) is sized to insert directly into the hub of any standard 1-1/4" socket-end fitting — tee branch outlet, cross port, coupling end, elbow outlet, or valve body — and is solvent-cemented in place to form a permanent, leak-free joint at the outer face of the hub. The 1" slip socket outlet accepts 1" PVC pipe for a permanent solvent-cement bond on the downstream pipe run, completing the all-socket near-full-size transition in a single cemented fitting body. This Spigot x Slip all-socket configuration is the correct choice when both the upstream 1-1/4" assembly and the downstream 1" continuation are all-socket cemented PVC construction — distinct from the 438-168 (1-1/4" x 1" Spigot x FPT, confirmed in this catalog session), which cements into the same 1-1/4" socket hub but provides a 1" female-threaded outlet for a male-threaded downstream component rather than a socket pipe run; from 439-168 (1-1/4" x 1" MPT x FPT Hex Bushing, confirmed in this session), which threads into a 1-1/4" female-threaded port rather than cementing into a socket hub; and from the 437-166 (1-1/4" x 1/2" Spigot x Slip, confirmed in this session), which serves the more aggressive 2.5:1 small-bore service lateral application at the same spigot inlet. The 1-1/4" to 1" near-full-size transition is most commonly encountered where a 1-1/4" socket tee branch or coupling must supply a continuing 1" socket distribution or service run at the hub location — a step-down driven purely by the downstream pipe diameter specification rather than by flow reduction requirements; in irrigation assemblies where a 1-1/4" socket sub-main hub must supply a 1" socket zone lateral; in commercial plumbing where a 1-1/4" socket distribution main hub must supply a 1" socket dedicated service or equipment supply run; and in process water systems where a 1-1/4" socket manifold hub must feed a 1" socket distribution branch in a single compact all-socket fitting.

Rated to approximately 370 psi at 73°F (governed by the 1-1/4" spigot end), this bushing 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 the spigot exterior and the interior of the receiving 1-1/4" socket hub per ASTM D2564 procedures, inserting fully and holding briefly for initial set. Apply solvent cement separately to the 1" pipe end exterior and the fitting's slip socket interior before inserting the pipe fully and maintaining a quarter-turn during assembly. Allow adequate cure time on both cemented joints before pressurizing the system, and derate pressure ratings for elevated temperatures per published derating curves.

Specifications:

Industries & Applications:

• Irrigation & Water Distribution — Steps down 1-1/4" socket tee branch outlets, cross ports, manifold hubs, and coupling ends to a continuing 1" socket PVC pipe run in residential, agricultural, and municipal irrigation systems where a 1" socket zone lateral, sub-main continuation, or dedicated distribution branch must originate directly at a 1-1/4" socket fitting hub in all-socket cemented construction — the near-full-size all-socket hub transition at the most common adjacent-size step-down in 1-1/4" to 1" socket irrigation sub-main assemblies
• Commercial Plumbing — Transitions 1-1/4" socket fitting hub branch outlets, coupling ends, and manifold ports to continuing 1" socket dedicated fixture supply, equipment feed, and distribution pipe runs in commercial building water distribution systems where all-socket PVC construction is maintained throughout and the near-full-size 1.25:1 hub transition supplies a high-flow 1" socket branch run in a single compact fitting
• Industrial Process Piping — Steps down 1-1/4" socket fitting hub branch outlets and manifold ports to continuing 1" socket process water distribution runs, equipment feed lines, and service branch assemblies in water treatment, chemical processing, and manufacturing facilities where all-socket cemented construction is maintained at every near-full-size hub reduction point throughout the system
• Pump Station Assemblies — Provides near-full-size all-socket hub-to-pipe transitions at 1-1/4" socket fitting hub locations on pump station suction and discharge socket assemblies where the downstream pipe run must continue at 1" socket construction without a threaded interface in the transition assembly
• Water Treatment & Aquaculture — Used at 1-1/4" socket tee branches, cross ports, coupling ends, and manifold hub outlets where the downstream 1" socket run must be supplied in a single all-cemented near-full-size compact fitting with NSF/ANSI 61 compliance required throughout the all-socket assembly
• Chemical Handling — Delivers a corrosion-resistant all-socket near-full-size hub-to-run transition in systems conveying acids, caustics, fertilizer solutions, and other fluids incompatible with metal fittings or threaded transitions, where a 1" socket downstream run must originate directly at a 1-1/4" socket fitting hub without a threaded interface at the near-full-size reduction point