Bushing, Spigot x Slip (Flush Style) PVC Schedule 80 2-1/2" x 1" (837-289)

The 837-289 is a 2-1/2" x 1" PVC Schedule 80 flush bushing in a spigot x slip (spigot x socket) configuration. The spigot end inserts into a 2-1/2" receiving socket fitting for solvent welding on the inlet side, while the 1" slip socket on the outlet side receives 1" plain-end pipe for solvent welding on the downstream side — making this an all-solvent-weld reducing bushing with no threaded connections at either end.

The all-solvent-weld configuration is the defining characteristic of the 837-series and the primary distinction from the 838-series bushings in the same size family. Where the 838-289 covers the same 2-1/2" x 1" size reduction with a female-threaded (FPT) outlet, the 837-289 is the correct specification when the size reduction occurs within a continuous solvent-weld pipe system — stepping the assembly down from 2-1/2" to 1" entirely within solvent-weld construction, maintaining the pressure integrity and permanence of a fully fused system on both sides of the transition.

The 2-1/2" to 1" span is a substantial size reduction — three nominal pipe sizes in a single bushing body. At this reduction ratio, the 837-289 is most commonly found at points in a system where a large-diameter distribution header needs to feed a significantly smaller solvent-weld branch line, sampling loop, instrument connection, or secondary service run without the use of threaded transitions. The all-solvent-weld construction makes it particularly suited for high-pressure industrial systems, chemical distribution headers, and any application where maintaining a fully fused piping system through a large size transition is an engineering or specification requirement.

The flush style seats completely within the receiving 2-1/2" socket with no protruding hex shoulder at the fitting face — the preferred profile when a clean, low-profile assembly is needed or when fitting clearance in the surrounding system is limited. The 1" slip socket on the outlet accepts standard 1" plain-end pipe directly, allowing the downstream pipe run to continue without any intermediate adapter or transition fitting between the bushing and the next pipe section.

Built to Schedule 80 wall thickness standards from rigid PVC compound, the 837-289 carries the elevated pressure ratings required for demanding industrial and commercial pressure service. Like all Schedule 80 PVC fittings, it is fully resistant to corrosion, chemical attack, and biological fouling — with none of the weight, rust, or galvanic concerns associated with metal reducing fittings of equivalent pressure rating.

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Specifications:

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Industries & Applications:

• Industrial Process Piping — Reducing a 2-1/2" socket fitting to a 1" solvent-weld pipe run within a fully fused Schedule 80 process system where a large size transition and all-solvent-weld construction through the reduction point are both required
• Chemical Processing — Stepping down a 2-1/2" fitting socket to a 1" pipe run in corrosive-fluid distribution systems where maintaining all-solvent-weld construction through a large size reduction preserves full chemical resistance and pressure integrity at the transition
• Water Treatment & Municipal — Transitioning from a large-diameter socket fitting to a small-bore 1" solvent-weld branch line or sampling loop within a continuous Schedule 80 distribution or treatment system
• Irrigation Systems — Reducing a 2-1/2" socket fitting to a 1" solvent-weld pipe continuation on Schedule 80 commercial or agricultural irrigation systems where a large step-down to a small-bore branch is required within an all-plastic, all-solvent-weld assembly
• Commercial Plumbing — Installing a large-reduction size transition within a high-pressure solvent-weld mechanical system where the flush profile keeps the fitting within available socket clearances and no threaded transition is desired at the reduction point
• Industrial HVAC & Cooling — Stepping down from a 2-1/2" socket fitting to a 1" solvent-weld branch within a fully fused chilled water, cooling tower, or chemical treatment piping system