Bushing, Spigot x Slip (Flush Style) PVC Schedule 80 1" x 3/4" (837-131)

This 1" x 3/4" Schedule 80 PVC Bushing (Spigot x Slip) provides a compact, all solvent-cement transition from a 1" socket-end fitting hub down to a 3/4" PVC pipe run in industrial, chemical, and commercial piping systems requiring Schedule 80 pressure ratings. Constructed in dark gray Schedule 80 PVC, it delivers the elevated wall thickness and pressure capacity required in demanding installations where standard Schedule 40 fittings are insufficient and where a corrosion-resistant, all socket-to-socket diameter reduction is required at an existing fitting port with no threaded interface needed at the transition point.

The 1" spigot (male plain end) is sized to insert directly into the hub of any standard 1" 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 3/4" slip socket interior accepts a 3/4" PVC pipe for a permanent solvent-cement bond on the reduced-diameter outlet side, completing the transition in a single compact body. This Spigot x Slip configuration is the all-solvent-cement approach to socket reducing at this size combination and is the correct choice when both the upstream 1" assembly and the downstream 3/4" run are entirely socket-based Schedule 80 PVC systems with no threaded interfaces required at the transition point. It should not be confused with the 838-131 (Spigot x FPT, same size and schedule), which provides a 3/4" female-threaded outlet for connecting to male NPT-threaded components, or with the 839 series (MPT x FPT Flush Bushing), which is an all-threaded fitting that threads into a female port rather than cementing into a socket hub. The 1" to 3/4" step-down is a common one-step nominal reduction in Schedule 80 systems — most frequently encountered at socket fitting ports serving 3/4" dedicated service lines, instrument supply runs, chemical injection feeds, and small-bore distribution branches that tap off a 1" Schedule 80 mainline socket assembly where a cemented outlet is preferred over a threaded interface.

Rated to approximately 630 psi at 73°F (governed by the 1" spigot end), this bushing is well-suited for demanding pressure service across a broad range of industrial, chemical, and commercial fluid handling applications. Its Schedule 80 PVC composition provides excellent resistance to acids, bases, salts, and chlorinated water, making it a durable long-term alternative to metal reducing bushings in corrosive environments. NSF/ANSI 61 listing confirms suitability for potable water contact.

Apply solvent cement to the spigot exterior and the interior of the receiving 1" socket hub per ASTM D2564 procedures, inserting fully and holding briefly for initial set. Apply solvent cement separately to the 3/4" pipe end exterior and the fitting's slip socket interior before inserting the pipe fully and maintaining a quarter-turn during assembly for even cement distribution. Complete each cemented joint in sequence and allow adequate cure time before pressurizing the system. Derate pressure ratings for elevated temperatures per published derating curves.

Specifications:

Industries & Applications:

• Industrial Process Piping — Provides an all solvent-cement socket-to-socket diameter reduction at instrument line stubs, chemical injection feed branches, and dedicated small-bore service connections transitioning from 1" Schedule 80 socket fitting ports to 3/4" Schedule 80 pipe runs in chemical processing, water treatment, and manufacturing facilities where a cemented outlet is required throughout the all-socket assembly
• Chemical Handling — Delivers a corrosion-resistant, all solvent-cement socket reduction in systems conveying acids, caustics, fertilizer solutions, and other fluids incompatible with metal fittings, particularly where a 3/4" Schedule 80 pipe run must branch off a 1" socket fitting hub without introducing a threaded interface at the transition point in an all-socket chemical distribution assembly
• Commercial Plumbing — Reduces 1" socket-end Schedule 80 tee branches and fitting ports to 3/4" Schedule 80 pipe runs at branch service connections, equipment feed lines, and pressure gauge supply stubs in high-pressure or exposed commercial building water supply systems where all-socket Schedule 80 construction is specified throughout
• Irrigation & Water Distribution — Transitions 1" Schedule 80 socket fitting ports to 3/4" Schedule 80 pipe runs at zone header branches, instrument supply stubs, and small-bore lateral connections in high-pressure agricultural and municipal irrigation systems where Schedule 80 all-socket construction is specified at critical service branch transition points
• Water Treatment & Aquaculture — Used at filter housing branch ports, recirculating system header taps, chemical dosing feed line branches, and instrument supply stubs where a 1" Schedule 80 socket assembly must supply a 3/4" cemented pipe run and NSF/ANSI 61 compliance is required throughout the all-socket assembly
• HVAC & Mechanical Systems — Transitions 1" socket-end Schedule 80 fitting ports to 3/4" Schedule 80 pipe runs at sensor supply stubs, drain valve feed lines, and small-bore service branches on cooling tower distribution headers, chilled water loops, and chemically treated water systems requiring Schedule 80 pressure ratings throughout the all-socket installation