Bushing, Spigot x Slip (Flush Style) PVC Schedule 80 1/2" x 1/4" (837-072)

This 1/2" x 1/4" Schedule 80 PVC Bushing (Spigot x Slip) provides a compact, all solvent-cement transition from a 1/2" socket-end fitting hub down to a 1/4" PVC socket pipe run or socket-end component 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 a 1/2" Schedule 80 socket assembly must reduce to a 1/4" socket-based connection without introducing any threaded interfaces at the transition point.

The 1/2" spigot (male plain end) is sized to insert directly into the hub of any standard 1/2" socket-end fitting — tee branch outlet, cross port, coupling end, or valve body — and is solvent-cemented in place to form a permanent, leak-free joint at the outer face. The 1/4" slip socket interior accepts a 1/4" PVC pipe end or socket-end component 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 small-bore size combination, and is the correct choice when both the upstream 1/2" assembly and the downstream 1/4" run or component are entirely socket-based Schedule 80 PVC systems with no threaded interfaces required at the transition point. It should not be confused with the 838-052 (Spigot x FPT, 3/8" x 1/4"), which provides a 1/4" female-threaded outlet for connecting to male NPT-threaded instrument components, or with the 839 series MPT x FPT Flush Bushing, which is installed entirely within threaded assemblies. At the 1/2" x 1/4" combination, this bushing serves the highly specialized segment of Schedule 80 socket assemblies where a microflow chemical dosing line, instrument supply run, or small-bore process connection must branch off a 1/2" socket main in an all-cemented configuration — preserving the all-socket integrity of the Schedule 80 system throughout the smallest-diameter transition in the assembly.

Rated to approximately 850 psi at 73°F (governed by the 1/2" spigot end), this bushing is well-suited for demanding pressure service at small-bore service and instrument connection points in Schedule 80 systems. Its 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 1/2" socket hub per ASTM D2564 procedures, inserting fully and holding briefly for initial set. Apply solvent cement separately to the 1/4" pipe end exterior or socket-end component and the fitting's slip socket interior before inserting fully and maintaining a quarter-turn during assembly for even cement distribution. At 1/4", the small socket engagement depth requires careful full insertion before the cement begins to set — partial insertion at this small diameter produces a particularly weak joint. 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 1/2"-to-1/4" socket transition at microflow chemical dosing branches, small-bore instrument supply connections, and dedicated miniature-diameter service runs off 1/2" Schedule 80 socket tees and manifold assemblies in chemical processing, water treatment, and manufacturing facilities where maintaining all-socket Schedule 80 construction at the smallest pipe diameter in the assembly is a system design requirement
• Chemical Handling — Delivers a corrosion-resistant, all solvent-cement small-bore socket reduction in Schedule 80 systems conveying acids, caustics, fertilizer solutions, and other fluids incompatible with metal fittings, particularly where a 1/4" socket pipe run or component must branch off a 1/2" Schedule 80 socket assembly without introducing a threaded interface — preserving the all-cemented integrity of chemical dosing distribution and microflow injection systems
• Water Treatment & Aquaculture — Used at chemical dosing distribution step-downs, microflow instrument supply branches, and small-bore sampling connection assemblies where a 1/2" Schedule 80 socket fitting must supply a 1/4" socket-based pipe run or component in a treatment or recirculating system where NSF/ANSI 61 compliance and all-cemented Schedule 80 construction are required throughout
• Commercial Plumbing — Reduces 1/2" socket-end Schedule 80 tee branches and fitting ports to 1/4" socket-based pipe runs at small-diameter instrument feed connections and monitoring port assemblies in high-pressure or exposed commercial building water supply systems where all-socket Schedule 80 construction is specified or preferred throughout
• Irrigation & Water Distribution — Transitions 1/2" Schedule 80 socket fitting ports to 1/4" socket-based pipe runs at dedicated small-bore instrument supply connections and monitoring point feed lines in high-pressure agricultural and municipal irrigation systems where Schedule 80 socket construction is maintained throughout and no threaded interface is required at the small-bore reduction point
• HVAC & Mechanical Systems — Transitions 1/2" socket-end Schedule 80 fitting ports to 1/4" socket-based pipe runs at microflow chemical feed distribution step-downs and instrument supply branches on cooling tower chemical distribution headers, chilled water monitoring assemblies, and chemically treated water system service lines within the Schedule 80 pressure class