Bushing, Spigot x FPT (Flush Style) PVC Schedule 80 1" x 3/4" (838-131)

This 1" x 3/4" Schedule 80 PVC Bushing (Spigot x FPT) provides a compact, inline solution for transitioning a 1" socket-end fitting hub down to a 3/4" female-threaded connection in industrial, chemical, and commercial PVC 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 large-diameter socket assembly must interface with a 3/4" male NPT-threaded valve, pump port, instrument connection, or threaded service component without additional transition hardware.

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" FPT interior accepts any standard 3/4" male NPT-threaded fitting, nipple, valve, or equipment connection, providing a direct socket-to-thread transition in a single compact body. This Spigot x FPT configuration is the correct choice when a 1" Schedule 80 socket assembly must terminate at or feed into a 3/4" threaded component — making it the mixed-connection approach to this size reduction, distinct from the all-threaded Schedule 80 Flush Bushing (839 series, MPT x FPT), which 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 frequently encountered at instrument taps, solenoid valve connections, chemical injection ports, and small-bore service branches where a 3/4" male-threaded component must be received off a 1" socket Schedule 80 assembly with a threaded outlet at the transition point.

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. On the 3/4" 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:

• Industrial Process Piping — Transitions 1" socket-end Schedule 80 tees, crosses, and manifold assemblies to 3/4" male-threaded instrument connections, chemical injection ports, solenoid valve inlets, and small-bore service branches in chemical processing, water treatment, and manufacturing facilities where elevated pressure ratings are required throughout the all-Schedule-80 assembly
• Chemical Handling — Provides a corrosion-resistant, mixed-connection socket-to-thread transition in systems conveying acids, caustics, fertilizer solutions, and other fluids incompatible with metal fittings, particularly at chemical metering pump connections, injection point assemblies, and dosing manifold branch points where a 3/4" male-threaded component must be received off a 1" Schedule 80 socket fitting hub
• Commercial Plumbing — Connects 1" socket-end Schedule 80 tee branches and fitting ports to 3/4" male-threaded valves, pressure gauges, backflow preventer connections, and branch service lines in high-pressure or exposed commercial building water supply systems where Schedule 80 is specified throughout
• Irrigation & Water Distribution — Transitions 1" Schedule 80 socket fitting ports to 3/4" male-threaded solenoid valves, zone control valves, filter housing connections, and instrument taps in high-pressure agricultural and municipal irrigation systems where Schedule 80 pressure ratings are specified at critical service branch transition points
• Water Treatment & Aquaculture — Used at filter housing branch ports, chemical dosing connection points, recirculating system instrument taps, and UV sterilizer inlet stubs where a 1" Schedule 80 socket assembly must supply a 3/4" threaded service component and NSF/ANSI 61 compliance is required throughout the system
• HVAC & Mechanical Systems — Transitions 1" socket-end Schedule 80 fitting ports to 3/4" male-threaded sensor connections, drain valve stubs, and chemical feed taps on cooling tower supply headers, chilled water distribution mains, and chemically treated water systems requiring Schedule 80 pressure ratings at socket-to-thread transition points