We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Malleable iron reducer coupling with female NPT threads

Value Brand

Value Brand Reducer Coupling 1-1/4" x 3/4" FNPT Malleable Class 300

SKU CH-F63G-F0ZED

A malleable iron Class 300 reducing coupling joining 1-1/4" and 3/4" FNPT pipe threads

  • Malleable iron construction handles high-pressure Class 300 systems
  • Female NPT threads on both ends create secure pipe connections
  • Reduces 1-1/4 inch to 3/4 inch pipe sizes efficiently
  • 11-1/2 and 14 thread counts ensure proper sealing
  • New condition guarantees full structural integrity out of the box

Reducer Coupling 1-1/4" x 3/4" FNPT

This malleable iron reducing coupling joins a 1-1/4 inch female NPT pipe to a 3/4 inch female NPT pipe. It is rated for Class 300 service and carries the ZORO SELECT brand. The fitting is new and suited for plumbing installations that require a step-down in pipe diameter.

Thread engagement and pressure handling

The coupling provides 11 threads per inch on the larger end and 14 threads per inch on the smaller end for secure engagement. Malleable iron construction supports the Class 300 pressure rating during sustained system operation. The material resists deformation under continuous load better than lighter-duty alternatives.

Verify pipe size and thread standard before ordering

Confirm that both pipes use female NPT threads and match the 1-1/4 inch and 3/4 inch nominal sizes exactly. Ensure the system design calls for a Class 300 malleable iron fitting rather than a different pressure class or material. This coupling does not adapt to other thread types or pipe diameters.

Highlights

  • Malleable iron construction handles high-pressure Class 300 systems
  • Female NPT threads on both ends create secure pipe connections
  • Reduces 1-1/4 inch to 3/4 inch pipe sizes efficiently
  • 11-1/2 and 14 thread counts ensure proper sealing
  • New condition guarantees full structural integrity out of the box

Specifications

BrandZORO SELECT

Questions about this item

How much heat does the malleable iron coupling generate during continuous operation?

The malleable iron fitting does not generate heat; it simply connects 1-1/4" and 3/4" FNPT threads in a Class 300 piping system.

Which pipe threads and sealant must I already have to install this reducer coupling?

You need male NPT threads — 11-1/2 TPI on the 1-1/4" side and 14 TPI on the 3/4" side — plus thread sealant or tape rated for Class 300 pressure.

Will the 1-1/4" x 3/4" FNPT threads mate with older steel pipe that has the same nominal sizes?

Yes, the NPT threads follow the same 11-1/2 and 14 threads-per-inch standards used on legacy steel pipe of matching nominal diameters.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.