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
Galvanised malleable iron union coupling, 2 1/2 inch NPT threads

Value Brand

Value Brand Union Coupling 2 1/2" NPT Class 150

SKU CH-J1VH-B0HRC

Malleable iron union coupling with galvanised finish, Class 150 rated for 2 1/2 inch NPT female connections

  • Malleable iron construction resists cracking under pressure
  • Galvanised coating protects against rust in wet systems
  • Class 150 rating suits standard low-pressure piping
  • 2 1/2 inch NPT threads connect to matching pipe sizes
  • Female threads on both ends simplify inline assembly

2 1/2" NPT Class 150 Malleable Iron Union

This malleable iron union connects two 2 1/2 inch NPT female threads in galvanised pipework. It is rated for Class 150 service and suits industrial plumbing or compressed air lines. The fitting is supplied new under the ZORO SELECT brand. It is not intended for potable water systems or applications requiring lead-free certification.

Installing the union on galvanised pipe

Apply thread sealant or tape to the male threads before engaging the union nut and tailpieces. Tighten evenly to avoid cross-threading the coarse NPT form. The most common issue is leakage caused by insufficient sealant or debris on the seating faces. Ensure the pipe ends are clean and square before assembly.

Checking your existing pipework before ordering

Verify that both mating pipes are 2 1/2 inch NPT male threads and match the Class 150 pressure class. Confirm the system media is compatible with galvanised malleable iron. This product contains chemicals listed under California Proposition 65 as known to cause cancer and reproductive harm, so check local regulations for handling and installation requirements.

Highlights

  • Malleable iron construction resists cracking under pressure
  • Galvanised coating protects against rust in wet systems
  • Class 150 rating suits standard low-pressure piping
  • 2 1/2 inch NPT threads connect to matching pipe sizes
  • Female threads on both ends simplify inline assembly

Specifications

BrandZORO SELECT

Questions about this item

How do I confirm the 2 1/2" NPT Class 150 union is sealing correctly after installation?

Pressurise the line to its working limit and check the joint for any moisture; a dry connection means the malleable iron threads and gasket are holding.

What comes in the box with the ZORO SELECT 2WJ71 union and what must I supply?

The package contains the galvanised malleable iron union only; you will need pipe thread sealant or tape and the matching 2 1/2" NPT pipe lengths.

Which version of the Value Brand union should I choose for a standard 150 psi water line?

Select the Class 150 model with 2 1/2" female NPT ends; it is rated for that pressure class and matches the nominal pipe size.

Also in this aisle

People compared these

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