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Stainless steel reducing coupling, four inch by one and a half inch threaded ends

Zoro Select

Zoro Select Reduce Coupling 4x1-1/2 150 316 Thrd 4381036710

SKU CH-MRRZ-GTCDB

Reduces pipe diameter from 4 inches to 1-1/2 inches with 150 class 316 stainless threaded ends

  • Reduces pipe size from 4 inch to 1-1/2 inch for flexible plumbing layouts
  • Rated for 150 pressure class to handle demanding industrial applications
  • Constructed from 316 stainless steel for corrosion resistance and long service life
  • Threaded connection enables quick installation without welding equipment
  • Zoro Select brand delivers reliable industrial plumbing components for professional use

Zoro Select Reduce Coupling 4x1-1/2

This Zoro Select reduce coupling joins a 4 inch pipe to a 1-1/2 inch pipe in industrial plumbing systems. It is built for professionals who need a reliable transition between different pipe diameters. The coupling is supplied new and ready for installation.

150 pressure class and 316 stainless steel

The coupling carries a 150 pressure class rating and is made from 316 stainless steel for corrosion resistance. This combination determines whether the part meets the pressure and chemical demands of your piping system. Verify both values against your design requirements before ordering.

Threaded connection for direct assembly

The threaded ends allow direct assembly onto matching male threads without welding or flanging. This reduces installation time and eliminates the need for additional adapters. Ensure the surrounding pipework uses compatible thread standards for a leak-free joint.

How it compares

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

Price $77.99
Pricier than about 57% of the 1,087 comparable items (median $57.99).

Specifications

Product
Brand nameZORO SELECT

Questions about this item

What does the 150 rating mean for pressure handling in a real installation?

The 150 rating indicates a 150-pound pressure class, suitable for standard low-pressure piping systems up to that working pressure.

How does the 316 stainless steel and threaded connection affect compatibility?

The 316 stainless steel offers strong corrosion resistance, and the threaded ends connect directly to matching NPT pipe threads without welding.

What pipe sizes does the 4 by 1-1/2 inch coupling join and how is it mounted?

It joins a 4-inch pipe to a 1-1/2-inch pipe using threaded connections on both ends, requiring no special tools beyond standard pipe wrenches.

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