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 coupling, 1-1/4 inch FNPT, Class 150, dark metal finish

Value Brand

Value Brand 5P555 Coupling 1-1/4" FNPT Malleable Iron Class 150

SKU CH-XTGH-ZV9CA

Connects 1-1/4" NPT pipes using Class 150 malleable iron female threads

  • Malleable iron construction provides Class 150 pressure rating
  • Female NPT threads accept 11 1/2 threads per inch
  • 1-1/4 inch pipe size fits standard plumbing systems
  • ZORO SELECT brand ensures consistent manufacturing quality
  • New condition guarantees unused, factory-fresh fitting

Value Brand 5P555 Coupling 1-1/4" FNPT

This malleable iron coupling connects two sections of 1-1/4 inch pipe using female NPT threads on both ends. It is rated for Class 150 service and suits plumbing installations requiring a straight, rigid joint. The fitting is supplied new and ready for assembly with standard pipe sealant or tape.

Malleable Iron Build and Threaded Ends

The malleable iron body provides mechanical strength and resistance to cracking under stress or vibration. Both ends feature 11-1/2 threads per inch to the NPT standard, creating a tapered seal when tightened. The female threads accept male pipe nipples or fittings directly without additional adapters.

Class 150 Pressure Boundary

Class 150 defines the maximum non-shock pressure rating at ambient temperature for this fitting. Systems operating above this limit or subject to high-temperature steam need a higher-class component. The coupling does not incorporate a gasket or union feature, so disassembly requires unthreading the connected pipe runs.

How it compares

Measured against everything we stock in Hose Fittings, Adapters & Clamps, at today’s prices. Recalculated every night.

Price $2.99
Cheaper than about 90% of the 2,955 comparable items (median $17.99).

Specifications

Product
Brand nameZORO SELECT

Questions about this item

What thread standard does the 1-1/4" FNPT connection use?

The coupling uses NPT threads with an 11 1/2 thread pitch on both ends.

What material and pressure class define the fitting's physical limits?

It is made of malleable iron rated to Class 150 for standard plumbing pressures.

How do I install this coupling without damaging the threads?

Apply pipe thread sealant to the male threads, hand-tighten, then finish with a wrench — avoid over-tightening which can crack the iron.

More in Hose Fittings, Adapters & Clamps

Similar items