Reducer Bushing, Spigot x FPT PVC Schedule 40 3/4" x 1/2" (438-101)
$0.49
This 3/4" x 1/2" Schedule 40 PVC Reducer Bushing (Spigot x FPT) provides a compact mixed-connection transition from a 3/4" socket fitting hub down to a 1/2" female NPT-threaded outlet, consolidating a modest 1.5:1 diameter reduction and a socket-to-thread material transition into a single fitting body — the most widely specified mixed-connection socket-hub-to-threaded reduction at the dominant residential and light commercial all-socket irrigation and distribution grid diameter. Constructed in white Schedule 40 PVC, it offers reliable performance wherever a 1/2" male-threaded solenoid valve inlet, drip emitter manifold stub, chemical injection port, pressure gauge connection, or dedicated small-bore service component must be installed directly at a 3/4" socket fitting hub without additional adapter hardware.
The 3/4" spigot (male plain end) is sized to insert directly into the hub of any standard 3/4" socket-end fitting — tee branch outlet, cross port, coupling end, elbow outlet, side outlet elbow port, or valve body — and is solvent-cemented in place to form a permanent, leak-free joint at the outer face of the hub. The 1/2" FPT interior accepts any standard 1/2" male NPT-threaded fitting, solenoid valve inlet, chemical injection nipple, instrument connection, or service component for a pressure-tight mechanical connection when made up with thread sealant or PTFE tape. The 1/2" FPT outlet is the most widely specified small-bore service connection size in residential and light commercial PVC irrigation and plumbing systems — making 438-101 the highest-demand entry in the 3/4" spigot inlet 438 sub-series and the correct single-fitting solution wherever a 3/4" all-socket assembly must supply a 1/2" male-threaded service component at a tee branch, cross port, or manifold hub. This Spigot x FPT configuration should not be confused with the 439-101 (3/4" x 1/2" MPT x FPT Hex Bushing, confirmed in this catalog session), which threads into a 3/4" female-threaded port rather than cementing into a 3/4" socket hub — the eighth confirmed case in this catalog session of a parallel 438/439 same-size pair where the inlet-type distinction is the sole differentiator and the highest-priority disambiguation; nor with 438-098 (3/4" x 1/4" Spigot x FPT, confirmed in this session), which serves the specialized 1/4" NPT instrument port application at the same 3/4" spigot inlet rather than the broad 1/2" small-bore service connection; nor with 837-101 (3/4" x 1/2" Schedule 80 Spigot x Slip Bushing, confirmed in this session), which is the Schedule 80 dark gray counterpart at the same 3/4" spigot inlet but provides an all-socket slip outlet for a cemented pipe run rather than a female-threaded outlet for a male-threaded service component; nor with 430-101 (3/4" x 1/2" Schedule 40 FPT Reducer Coupling, confirmed in this session), which is an inline coupling joining two male-threaded components rather than a spigot bushing cementing into a socket hub. This is the more broadly applicable of the two confirmed 3/4" spigot inlet 438 entries — serving the widest range of downstream service components at the 1/2" FPT outlet versus the specialized instrument port application of 438-098 at the 1/4" FPT outlet.
Rated to approximately 480 psi at 73°F (governed by the 3/4" spigot end), this bushing is suited for standard commercial and light industrial water distribution and irrigation service within its pressure class. NSF/ANSI 61 listing confirms suitability for potable water contact.
Apply solvent cement to the spigot exterior and the interior of the receiving 3/4" socket hub per ASTM D2564 procedures, inserting fully and holding briefly for initial set. On the 1/2" FPT end, use a quality pipe thread sealant or PTFE tape on the male NPT threads of the mating downstream component before engagement. Avoid over-torquing — PVC threads require hand-tight plus one to two turns. 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:
| Attribute | Detail |
|---|---|
| Part Number | 438-101 |
| Fitting Type | Reducer Bushing |
| Connection Type | Spigot x FPT (Male Plain End × Female Pipe Thread) |
| Size | 3/4" x 1/2" (Spigot Inlet × FPT Outlet) |
| Schedule / Series | Schedule 40 |
| Material | PVC (Polyvinyl Chloride) |
| Color | White |
| Pressure Rating | 480 psi @ 73°F (governed by 3/4" spigot end; verify against manufacturer tables) |
| ASTM Standard | D2466 (spigot end), D2464 (FPT end) |
| NSF/ANSI | NSF/ANSI 61 Listed (verify listing status) |
| Thread Standard | NPT (National Pipe Taper) — 1/2" FPT outlet |
| Joint Method | Solvent Cement — spigot end (ASTM D2564); Thread Sealant — FPT end |
| Temperature Range | Up to 140°F (derate pressure for elevated temps) |
| Bond Type | Permanent at spigot end; Removable at FPT end |
| End Configuration | 3/4" spigot inlet (into socket hub); 1/2" FPT outlet (receives 1/2" male NPT service component) |
| Reduction Ratio | 1.5:1 nominal (3/4" to 1/2") |
Industries & Applications:
- Irrigation & Water Distribution — Provides 1/2" male-threaded solenoid valve inlets, drip emitter manifold stubs, small-bore service line taps, and dedicated branch connections directly at 3/4" socket tee branches, cross ports, side outlet elbow ports, and manifold hubs in residential, agricultural, and light commercial irrigation systems where the dominant 3/4" all-socket mainline or grid header assembly must supply 1/2" threaded service components at valve station and distribution manifold hub locations — the most widely specified mixed-connection socket-hub-to-threaded service tap at the dominant 3/4" residential irrigation grid header diameter
- Drip & Micro-Irrigation Systems — Provides the standard hub-direct socket-to-threaded transition for 1/2" male-threaded drip manifold inlets, pressure regulator connections, filter housing ports, and zone valve body connections at 3/4" socket tee branch and cross port hubs throughout drip and micro-irrigation distribution assemblies where the 3/4" all-socket grid must serve 1/2" threaded downstream distribution components at each hub tap location
- Commercial Plumbing — Incorporates 1/2" male-threaded branch service connections, pressure gauge taps, ball valve inlets, and instrument stubs directly at 3/4" socket fitting hub outlets in commercial building water distribution systems where small-bore 1/2" threaded service connections must be tapped off 3/4" socket assembly ports without an intermediate adapter chain at the hub port location
- Industrial Process Piping — Transitions 3/4" socket fitting hub branch outlets and manifold ports to 1/2" male-threaded instrument connections, chemical injection ports, sampling valves, and small-bore service branch components in water treatment, chemical processing, and manufacturing facilities where 1/2" threaded downstream service components must be tapped directly off 3/4" socket assembly ports
- Chemical Handling — Delivers a corrosion-resistant mixed-connection socket-to-thread transition at 3/4" socket fitting hub ports in systems conveying acids, caustics, fertilizer solutions, and other fluids incompatible with metal fittings, where 1/2" male-threaded chemical injection stubs, metering component inlets, and small-bore service line taps must be incorporated at socket assembly ports without metal adapter chains
- Water Treatment & Aquaculture — Used at 3/4" socket tee branches, cross ports, and manifold hub outlets where 1/2" male-threaded chemical dosing ports, instrument connections, treatment equipment inlets, and small-bore service stubs must be incorporated directly at socket fitting hub locations with NSF/ANSI 61 compliance required throughout the all-socket assembly
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Reducer Bushing, Spigot x FPT PVC Schedule 40 3/4" x 1/2" (438-101)
The 3/4" to 1/2" Reducer Bushing PVC fitting (Part #438-101) is a durable Schedule 40 PVC reducer engineered to transition from a 3/4" spigot connection to a 1/2" female-threaded (FIPT) opening. A reliable solution for plumbing, irrigation, and low-pressure water systems, it thrives where a secure size reduction and threaded connection are needed. Lightweight, corrosion-resistant, and NSF-certified for potable water, this fitting delivers dependable performance for both professionals and DIY installers alike.
Technical Specifications
- Nominal Pipe Size: 3/4" × 1/2"
- End Type: Spigot × Female Thread (FIPT)
- Material: Schedule 40 PVC
- Color: White
- Max Service Temperature: 140°F
- Listings: NSF-certified for potable water applications
- Standards: Meets ASTM D1784 material requirements
- Part #: 438-101
- Product Family: Schedule 40 PVC
- Size Category: 3/4"
Confirming specifications supports safe, code-compliant installation and long-term durability in residential, commercial, and light-industrial water systems.
Typical Applications
This 3/4" to 1/2" bushing PVC fitting is commonly seen in:
- Residential and commercial plumbing systems
- Irrigation and sprinkler setups with threaded nozzles or emitters
- Aquaculture, hydroponic, and water circulation systems
- Water treatment lines requiring mixed-size connections
- Low-pressure industrial water distribution
With its NSF listing, this fitting is a trusted option across potable water systems; the Spigot × FIPT configuration makes it ideal for attaching valves, pumps, risers, and smaller threaded accessories.
Installation & Handling Tips
For a secure, leak-free installation, follow the best practices below:
- Clean and dry all surfaces before assembly
- Apply PVC primer and solvent cement to the spigot side when required
- Insert and hold the joint steady until the solvent weld sets
- Use PTFE tape or thread sealant on the FIPT connection
- Avoid over-tightening threaded components to prevent cracking
- Allow full curing time before pressure testing
- Store fittings away from prolonged direct sunlight to prevent UV degradation
When you take these steps, you help maintain long-term performance and reduce the risk of field failures.
Why Choose Maxx Supply?
Maxx Supply is home to high-quality Schedule 40 PVC fittings that meet NSF and ASTM standards, bringing dependable performance for plumbing, irrigation and construction projects. With fast nationwide shipping, competitive pricing, and a knowledgeable support team, Maxx Supply is a trusted partner for contractors, maintenance crews, DIYers, and anyone who needs reliable PVC components delivered quickly.
This 3/4" x 1/2" Schedule 40 PVC Reducer Bushing (Spigot x FPT) provides a compact mixed-connection transition from a 3/4" socket fitting hub down to a 1/2" female NPT-threaded outlet, consolidating a modest 1.5:1 diameter reduction and a socket-to-thread material transition into a single fitting body — the most widely specified mixed-connection socket-hub-to-threaded reduction at the dominant residential and light commercial all-socket irrigation and distribution grid diameter. Constructed in white Schedule 40 PVC, it offers reliable performance wherever a 1/2" male-threaded solenoid valve inlet, drip emitter manifold stub, chemical injection port, pressure gauge connection, or dedicated small-bore service component must be installed directly at a 3/4" socket fitting hub without additional adapter hardware.
The 3/4" spigot (male plain end) is sized to insert directly into the hub of any standard 3/4" socket-end fitting — tee branch outlet, cross port, coupling end, elbow outlet, side outlet elbow port, or valve body — and is solvent-cemented in place to form a permanent, leak-free joint at the outer face of the hub. The 1/2" FPT interior accepts any standard 1/2" male NPT-threaded fitting, solenoid valve inlet, chemical injection nipple, instrument connection, or service component for a pressure-tight mechanical connection when made up with thread sealant or PTFE tape. The 1/2" FPT outlet is the most widely specified small-bore service connection size in residential and light commercial PVC irrigation and plumbing systems — making 438-101 the highest-demand entry in the 3/4" spigot inlet 438 sub-series and the correct single-fitting solution wherever a 3/4" all-socket assembly must supply a 1/2" male-threaded service component at a tee branch, cross port, or manifold hub. This Spigot x FPT configuration should not be confused with the 439-101 (3/4" x 1/2" MPT x FPT Hex Bushing, confirmed in this catalog session), which threads into a 3/4" female-threaded port rather than cementing into a 3/4" socket hub — the eighth confirmed case in this catalog session of a parallel 438/439 same-size pair where the inlet-type distinction is the sole differentiator and the highest-priority disambiguation; nor with 438-098 (3/4" x 1/4" Spigot x FPT, confirmed in this session), which serves the specialized 1/4" NPT instrument port application at the same 3/4" spigot inlet rather than the broad 1/2" small-bore service connection; nor with 837-101 (3/4" x 1/2" Schedule 80 Spigot x Slip Bushing, confirmed in this session), which is the Schedule 80 dark gray counterpart at the same 3/4" spigot inlet but provides an all-socket slip outlet for a cemented pipe run rather than a female-threaded outlet for a male-threaded service component; nor with 430-101 (3/4" x 1/2" Schedule 40 FPT Reducer Coupling, confirmed in this session), which is an inline coupling joining two male-threaded components rather than a spigot bushing cementing into a socket hub. This is the more broadly applicable of the two confirmed 3/4" spigot inlet 438 entries — serving the widest range of downstream service components at the 1/2" FPT outlet versus the specialized instrument port application of 438-098 at the 1/4" FPT outlet.
Rated to approximately 480 psi at 73°F (governed by the 3/4" spigot end), this bushing is suited for standard commercial and light industrial water distribution and irrigation service within its pressure class. NSF/ANSI 61 listing confirms suitability for potable water contact.
Apply solvent cement to the spigot exterior and the interior of the receiving 3/4" socket hub per ASTM D2564 procedures, inserting fully and holding briefly for initial set. On the 1/2" FPT end, use a quality pipe thread sealant or PTFE tape on the male NPT threads of the mating downstream component before engagement. Avoid over-torquing — PVC threads require hand-tight plus one to two turns. 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:
| Attribute | Detail |
|---|---|
| Part Number | 438-101 |
| Fitting Type | Reducer Bushing |
| Connection Type | Spigot x FPT (Male Plain End × Female Pipe Thread) |
| Size | 3/4" x 1/2" (Spigot Inlet × FPT Outlet) |
| Schedule / Series | Schedule 40 |
| Material | PVC (Polyvinyl Chloride) |
| Color | White |
| Pressure Rating | 480 psi @ 73°F (governed by 3/4" spigot end; verify against manufacturer tables) |
| ASTM Standard | D2466 (spigot end), D2464 (FPT end) |
| NSF/ANSI | NSF/ANSI 61 Listed (verify listing status) |
| Thread Standard | NPT (National Pipe Taper) — 1/2" FPT outlet |
| Joint Method | Solvent Cement — spigot end (ASTM D2564); Thread Sealant — FPT end |
| Temperature Range | Up to 140°F (derate pressure for elevated temps) |
| Bond Type | Permanent at spigot end; Removable at FPT end |
| End Configuration | 3/4" spigot inlet (into socket hub); 1/2" FPT outlet (receives 1/2" male NPT service component) |
| Reduction Ratio | 1.5:1 nominal (3/4" to 1/2") |
Industries & Applications:
- Irrigation & Water Distribution — Provides 1/2" male-threaded solenoid valve inlets, drip emitter manifold stubs, small-bore service line taps, and dedicated branch connections directly at 3/4" socket tee branches, cross ports, side outlet elbow ports, and manifold hubs in residential, agricultural, and light commercial irrigation systems where the dominant 3/4" all-socket mainline or grid header assembly must supply 1/2" threaded service components at valve station and distribution manifold hub locations — the most widely specified mixed-connection socket-hub-to-threaded service tap at the dominant 3/4" residential irrigation grid header diameter
- Drip & Micro-Irrigation Systems — Provides the standard hub-direct socket-to-threaded transition for 1/2" male-threaded drip manifold inlets, pressure regulator connections, filter housing ports, and zone valve body connections at 3/4" socket tee branch and cross port hubs throughout drip and micro-irrigation distribution assemblies where the 3/4" all-socket grid must serve 1/2" threaded downstream distribution components at each hub tap location
- Commercial Plumbing — Incorporates 1/2" male-threaded branch service connections, pressure gauge taps, ball valve inlets, and instrument stubs directly at 3/4" socket fitting hub outlets in commercial building water distribution systems where small-bore 1/2" threaded service connections must be tapped off 3/4" socket assembly ports without an intermediate adapter chain at the hub port location
- Industrial Process Piping — Transitions 3/4" socket fitting hub branch outlets and manifold ports to 1/2" male-threaded instrument connections, chemical injection ports, sampling valves, and small-bore service branch components in water treatment, chemical processing, and manufacturing facilities where 1/2" threaded downstream service components must be tapped directly off 3/4" socket assembly ports
- Chemical Handling — Delivers a corrosion-resistant mixed-connection socket-to-thread transition at 3/4" socket fitting hub ports in systems conveying acids, caustics, fertilizer solutions, and other fluids incompatible with metal fittings, where 1/2" male-threaded chemical injection stubs, metering component inlets, and small-bore service line taps must be incorporated at socket assembly ports without metal adapter chains
- Water Treatment & Aquaculture — Used at 3/4" socket tee branches, cross ports, and manifold hub outlets where 1/2" male-threaded chemical dosing ports, instrument connections, treatment equipment inlets, and small-bore service stubs must be incorporated directly at socket fitting hub locations with NSF/ANSI 61 compliance required throughout the all-socket assembly
- Part #:
- 438-101
- Product Family:
- Sch 40 PVC
- Size:
- 3/4"
