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Stainless steel threaded reducing coupling, three inch to half inch, brushed silver finish

Zoro Select

Zoro Select Reduce Coupling 3"x1/2" 150 316 Thrd 4381036620

SKU CH-31R2-YSJ7G

Stainless steel 316 threaded reducing coupling joins 3 inch and 1/2 inch pipe at 150 psi

  • 3" to 1/2" size reduction fits mixed piping
  • 316 stainless steel resists corrosion in harsh fluids
  • 150 pressure class handles demanding industrial systems
  • Threaded ends install quickly with standard tools
  • Zoro Select brand built for professional plumbing use

Reduce Coupling 3" x 1/2

The Zoro Select reduce coupling joins a three-inch pipe to a half-inch pipe in threaded piping systems. It is built for industrial plumbing installations where a secure, leak-resistant transition between dissimilar diameters is required. The fitting is supplied new and ready for immediate use.

316 stainless steel threaded construction

The body is made from 316 stainless steel, providing corrosion resistance in aggressive fluid environments. National Pipe Thread connections allow direct assembly with standard pipe nipples, valves or equipment without welding or special tools. The material withstands repeated make-up and break-out cycles during maintenance.

Rated for 150 psi service

The coupling carries a 150 pressure class rating, defining the maximum working pressure for which the fitting is designed. System designers must verify that operating conditions stay within this limit to ensure safe, code-compliant performance.

How it compares

Measured against everything we stock in Drain Cleaners & Plumbing Tools, at today’s prices. Recalculated every night.

Price $45.99
Cheaper than about 57% of the 1,087 comparable items (median $57.99).

Specifications

Product
Brand nameZORO SELECT

Questions about this item

What pressure rating does the 150 class threaded coupling handle in practice?

The coupling is rated for 150 class service, suitable for standard industrial piping pressures at ambient temperature.

What pipe diameters and thread type are needed to mount this 316 stainless reducer?

It connects a 3 inch pipe to a 1/2 inch pipe using NPT tapered threads on both ends.

How is the 316 stainless threaded reducer installed, and what step is often missed?

Apply PTFE tape or pipe sealant to the male threads, tighten to the specified torque, and pressure-test the joint before full service.

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