Reducing Male Adapter, MPT x Slip PVC Schedule 40 1/2" x 3/8" (436-073)

This 1/2" x 3/8" Schedule 40 PVC Reducing Male Adapter (MPT x Slip) provides a compact mixed-connection transition from a 1/2" PVC socket pipe run to a 3/8" male NPT-threaded outlet, combining a solvent-cement socket inlet and a reduced male-threaded outlet in a single fitting body — the correct single-fitting solution wherever a 1/2" socket pipe run must terminate at a 3/8" female-threaded equipment port, instrument connection, flow meter inlet, or legacy service component without a multi-piece adapter assembly at the pipe run end. Constructed in white Schedule 40 PVC, it is the smallest confirmed reducing entry in the 436 series and the highest-pressure rated — carrying approximately 600 psi at 73°F — making it well-suited for the compact instrument, chemical injection, and precision flow service applications that most commonly specify 3/8" NPT connections at 1/2" PVC supply run terminations.

The 1/2" slip socket inlet accepts 1/2" PVC pipe for a permanent solvent-cement bond, anchoring the fitting to the upstream 1/2" socket distribution assembly at the pipe run termination point. The 3/8" MPT outlet threads directly into any standard 3/8" FPT or FIP female-threaded instrument port, flow meter inlet, pressure gauge female connection, equipment port, or dedicated legacy service fitting for a pressure-tight mechanical connection when made up with thread sealant or PTFE tape. The 3/8" MPT outlet is a less commonly specified NPT thread size than the widely used 1/2" service connection — driven entirely by the downstream equipment or instrument manufacturer's specified port size — making this the correct adapter for the specific application where a 1/2" socket pipe run must connect to a component whose female-threaded inlet is 3/8" NPT. This Reducing Male Adapter should not be confused with the 438-073 (1/2" x 3/8" Spigot x FPT Reducer Bushing, confirmed in this catalog session), which cements into a 1/2" socket fitting hub interior rather than accepting a 1/2" pipe end in a socket — both deliver a 3/8" NPT connection at a 1/2" PVC assembly point but from fundamentally different upstream geometries; 436-073 is the correct choice when the upstream 1/2" PVC assembly is a pipe run termination, while 438-073 is the correct choice when the upstream 1/2" assembly is a socket fitting hub port. It should also not be confused with the full-size 1/2" male adapters at other thread sizes (436-005 if stocked at 1/2" full-size), which maintain the same 1/2" diameter at both ends; with the 436-012 (1-1/4" full-size male adapter) or other confirmed 436 series entries at larger sizes; or with the functional inverse 435 series female adapter counterpart at this size (435-073 if stocked, 1/2" Slip x 3/8" FPT), which would provide a 3/8" female-threaded outlet for receiving a 3/8" male-threaded downstream component rather than threading into a female port.

Rated to approximately 600 psi at 73°F (governed by the 1/2" slip end) — the highest confirmed pressure rating in the 436 series — this adapter is suited for standard commercial and light industrial water distribution, irrigation, and instrument service applications well within its pressure class. NSF/ANSI 61 listing confirms suitability for potable water contact.

Apply solvent cement to both the pipe end and fitting socket per ASTM D2564 procedures, inserting fully and maintaining a quarter-turn during assembly. On the 3/8" MPT end, use a quality pipe thread sealant or PTFE tape before threading into the receiving female port. Avoid over-torquing — PVC threads require hand-tight plus one to two turns; at 3/8", the compact male thread is more susceptible to overtorque cracking than at larger sizes; confirm hand-tight seating of the male thread in the female port before applying final engagement turns. Allow adequate cure time on the cemented joint before pressurizing the system, and derate pressure ratings for elevated temperatures per published derating curves.

Specifications:

Industries & Applications:

• Instrument & Process Piping — Terminates 1/2" socket PVC instrument supply runs, sample line distribution assemblies, and chemical feed pipe sections at 3/8" female-threaded instrument ports, flow meter inlets, pressure gauge female connections, and legacy instrument fitting receptacles in manufacturing, water treatment, and laboratory facilities where the downstream instrument or measurement component specifies a 3/8" NPT female connection at the 1/2" socket pipe run termination point
• Irrigation & Water Distribution — Terminates 1/2" socket irrigation supply runs, pump station distribution pipe sections, and manifold supply laterals at 3/8" female-threaded flow meter connections, pressure monitoring ports, and legacy service fitting receptacles in agricultural and residential irrigation systems where downstream components specify a 3/8" NPT female inlet at the 1/2" socket pipe run termination
• Chemical Process Piping — Provides a corrosion-resistant mixed-connection socket-to-3/8"-male-thread transition at 1/2" socket pipe run terminations in chemical distribution assemblies, injection system supply pipe ends, and feed line socket run terminations conveying acids, caustics, fertilizer solutions, and other fluids incompatible with metal adapters where the downstream 3/8" female-threaded equipment or metering component must receive the pipe run at a 3/8" male NPT connection
• Commercial Plumbing — Terminates 1/2" socket PVC distribution pipe runs at 3/8" female-threaded equipment ports, legacy service fitting connections, and instrument tap receptacles in commercial building water distribution systems where the downstream component specifies a 3/8" NPT female port at the 1/2" socket pipe run termination
• Water Treatment & Aquaculture — Used at 1/2" socket pipe run termination points where 3/8" female-threaded flow meters, instrument connections, and treatment equipment ports must receive the socket run with a simultaneous size reduction and NSF/ANSI 61 compliant socket-to-male-thread transition in a single compact fitting body
• Laboratory & Analytical Systems — Terminates 1/2" socket fluid distribution pipe sections at 3/8" female-threaded instrument connections, sampling valve female ports, and flow measurement device inlets in laboratory, analytical, and pilot plant systems where the downstream analytical or measurement instrument specifies a 3/8" NPT female connection at the 1/2" socket supply run termination point