Bushing, Spigot x FPT (Flush Style) 3/4" x 1/2" PVC Schedule 80 (838-101)

This 3/4" × 1/2" Schedule 80 PVC Flush Bushing provides a one-step solvent-cement-to-thread size transition, reducing a 3/4" slip socket port down to a 1/2" female NPT threaded outlet in a single compact fitting. The 3/4" spigot end inserts directly into any standard 3/4" female slip socket fitting or coupling for solvent cement joining on the upstream side, while the 1/2" FPT end receives any compatible 1/2" male-threaded valve, nipple, dosing pump outlet, instrument supply component, or equipment connection on the reduced threaded side.

The one-step reduction from 3/4" to 1/2" is the minimal adjacent-size transition at the 3/4" inlet — and the 1/2" FPT outlet gives the 838-101 broad downstream application reach across the most common small-bore threaded component population in commercial and industrial Schedule 80 systems. One-half inch NPT is the standard connection size for chemical dosing pump outlets, metering valve bodies, back-pressure regulators, small solenoid valves, flow switches, pressure switches, level switches, and small equipment nozzles throughout irrigation, commercial plumbing, water treatment, and process piping systems. Wherever a 3/4" slip socket position in a solvent-welded Schedule 80 system must interface with any of these 1/2"-ported components, the 838-101 provides the most direct possible bridge — a single fitting that reduces the socket to the correct outlet size and introduces the threaded interface simultaneously at the socket face.

The spigot end is the defining feature that distinguishes the 838-101 from all-threaded alternatives at the 3/4" inlet size. The 839-series all-threaded bushing at 3/4" (such as the 839-098 at 3/4" × 1/4") threads into a female-threaded 3/4" port rather than cementing into a socket. When the 3/4" upstream connection is a slip socket opening — on a tee, coupling, cross, or slip-socket fitting — the 838-101 spigot end is the correct upstream interface. This allows a 1/2" threaded outlet to be introduced directly at any 3/4" slip socket position in the cemented system without modifying the upstream piping layout or adding an intermediate adapter fitting between the socket and the threaded transition.

The 838-101 should also be distinguished from any 837-series Spigot × Slip equivalent at 3/4" × 1/2" (if stocked). Where the 837-series all-cement bushing produces a 1/2" slip socket outlet for connecting a 1/2" cemented PVC pipe run downstream, the 838-101 produces a 1/2" FPT outlet for connecting a 1/2" male-threaded component. When the downstream connection is a cemented 1/2" pipe run, the 837-series applies; when the downstream connection is a threaded component presenting a 1/2" MPT inlet, the 838-101 is the correct selection.

The flush style eliminates the protruding hex shoulder of a standard hex bushing, producing a low-profile, streamlined assembly that installs cleanly inside the receiving 3/4" slip socket without adding axial bulk to the connection. In compact mechanical assemblies, manifold bodies, and equipment supply connections where adjacent fittings limit clearance at the socket position, the flush profile maintains clearance and keeps the fitting footprint tight to the socket face.

Manufactured in dark gray Schedule 80 PVC, this bushing delivers the increased wall thickness and mechanical strength required in industrial, chemical, and commercial pressure piping where Schedule 40 ratings are insufficient. PVC's broad chemical resistance covers acids, bases, salts, chlorine, and most common process fluids, providing long service life in corrosive environments where metal bushings would degrade, seize on threads, or contaminate the fluid stream. NSF/ANSI 61 listing confirms suitability for potable water contact.

Rated to 690 psi at 73°F (governed by the 3/4" spigot end), this fitting handles standard to elevated pressure service across the full range of 3/4" Schedule 80 PVC applications. For the spigot end, clean and dry the spigot exterior and receiving socket interior before application. Apply purple PVC primer to both mating surfaces, then apply a uniform coat of Schedule 80 PVC solvent cement to both surfaces before inserting. Hold firmly with a slight quarter-turn twist for 30 seconds and allow full cure time per the cement manufacturer's temperature and humidity guidelines before pressurizing. Apply PTFE tape or compatible thread sealant to all male threads engaging the 1/2" FPT end before installing downstream components. Hand-tighten plus one to two turns — do not over-torque PVC female threads. Apply published pressure derating factors for service temperatures above 73°F.

Specifications:

Industries & Applications:

• Chemical Dosing & Injection Systems — Introduces a 1/2" threaded outlet at a 3/4" slip socket position on secondary distribution headers, chemical feed tees, and manifold branch sockets where chemical dosing pump outlets, metering valve bodies, back-pressure regulators, and injection assembly inlets present 1/2" MPT connections — one of the defining applications for the 3/4" × 1/2" Spigot × FPT bushing given the prevalence of 1/2" NPT on standard chemical dosing and metering equipment interfacing with 3/4" socket header positions in Schedule 80 systems
• Industrial Process Piping — Provides a compact one-step spigot-to-thread size transition at 3/4" slip socket positions on secondary process headers, equipment supply connections, and distribution tee branch sockets in chemical processing, water treatment, and manufacturing facility piping where downstream 1/2" NPT ball valves, flow switches, pressure switches, solenoid valves, and small equipment nozzles must be connected at 3/4" socket positions without intermediate adapter assemblies
• Instrument Supply & Control System Piping — Transitions a 3/4" slip socket position on a solvent-welded process header or distribution tee to a 1/2" NPT instrument supply valve, flow indicator, pressure transmitter body, or control system component where the 1/2" instrument supply pipe or threaded instrument body must be introduced at a 3/4" socket position in the fully cemented Schedule 80 system
• Commercial Plumbing — Reduces a 3/4" slip socket port on a tee, coupling, or manifold to a 1/2" threaded outlet at shutoff valve connections, small pressure gauge ports, fixture supply branch points, and equipment connection stubs in mechanical room and building water distribution Schedule 80 systems where secondary headers in 3/4" cemented pipe must interface with 1/2" NPT-ported downstream plumbing components
• Water & Wastewater Treatment — Delivers a spigot-to-thread one-step size reduction at 3/4" socket positions on secondary process headers, chemical dosing distribution assemblies, and instrument supply taps in municipal and industrial water treatment facilities where 1/2" NPT downstream valves, dosing equipment, and instrument components must interface with 3/4" slip socket positions in the solvent-welded system
• Irrigation & Agricultural Systems — Reduces a 3/4" socket position on a tee, coupling, or cross to a 1/2" threaded outlet at control valve connections, chemical injection equipment inlets, fertigation dosing pump outlets, and small filter drain ports in solvent-welded Schedule 80 commercial irrigation, greenhouse, and agricultural water supply systems where 1/2" NPT downstream components interface with 3/4" slip socket secondary header positions
• HVAC & Mechanical Systems — Installed at 3/4" socket positions on Schedule 80 PVC cooling tower chemical feed secondary distribution assemblies, treated water branch tees, and glycol system supply connections where 1/2" NPT chemical dosing equipment, flow switches, and small-bore branch connections must interface with 3/4" slip socket positions in the solvent-welded mechanical system layout