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The VALUE COLLECTION 4RSB1/2*3/8 is a threaded pipe reducer fitting designed to transition from a 1/2-inch pipe to a 3/8-inch pipe using female NPT connections on both ends. Constructed from 304 stainless steel, this fitting offers solid corrosion resistance suitable for a wide range of fluid and gas piping applications. It carries a pressure rating of 150 psi and is built to Schedule 40 specifications, making it a reliable choice for standard commercial and light industrial piping systems. Licensed plumbers and pipefitters are the primary installers for this type of fitting.
This reducer is suited for residential and light commercial plumbing, HVAC condensate lines, compressed air systems, and general fluid transfer applications where a reduction from 1/2-inch to 3/8-inch pipe diameter is required. The FNPT x FNPT connection type means both the inlet and outlet accept male-threaded pipe ends, keeping installation straightforward in standard threaded piping configurations. It is appropriate for use with water, air, and compatible process fluids within the rated pressure limits.
Designed as an OEM-style replacement or standard-service fitting for threaded Schedule 40 piping systems requiring a 1/2-inch to 3/8-inch FNPT-to-FNPT reducer transition.
Installation should be performed by a licensed plumber or pipefitter in accordance with applicable IPC or local plumbing code requirements. Shut off and depressurize the line completely before removing any existing fittings or making new connections. Apply an appropriate thread sealant or PTFE tape to the male threads before engagement, and tighten to hand-tight plus the number of turns specified by the sealant manufacturer — do not overtighten stainless steel fittings. Inspect the joint for leaks after restoring pressure to service.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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