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Malleable iron pipe coupling, 2-1/2 inch FNPT, dark grey threaded body

Value Brand

Value Brand 2-1/2" Malleable Iron Coupling

SKU CH-9HWC-6K7KF

Malleable iron pipe coupling with FNPT threads rated for 300 psi at 150 °F and temperatures up to 366 °F

  • Malleable iron construction meets ASME B 16.3 and B 16.4 standards
  • Rated for 300 psi at 150 °F and 150 psi saturated steam
  • Operating range from -20 °F to 366 °F covers wide conditions
  • FNPT connection fits 2-1/2 in pipe for secure joints
  • FM Approved and UL Listed per ASTM A-197 and ASTM A47

2-1/2" Malleable Iron Coupling

This 2-1/2 inch malleable iron coupling connects threaded pipe sections in plumbing systems. It meets ASME B 16.3 and B 16.4 standards along with ASTM A-197 and ASTM A47 material specifications. The fitting carries FM Approved and UL Listed certifications for safety compliance. It suits installers needing a Class 150 rated FNPT connection.

Class 150 Pressure and Temperature Limits

The coupling handles a maximum pressure of 300 psi at 150 degrees Fahrenheit. Saturated steam pressure is rated at 150 psi. Operating temperature range spans from -20 degrees to 366 degrees Fahrenheit. These limits define the safe operating envelope for water, air, or steam service.

FNPT Threaded Connection Type

The fitting uses Female National Pipe Taper threads for assembly with compatible male-threaded pipe or nipples. This connection type requires thread sealant or tape to ensure a leak-free joint. It is not suitable for press-fit, solder, or grooved pipe joining methods. Buyers needing a different joining method should select an alternative fitting style.

How it compares

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

Price $10.99
Cheaper than about 68% of the 2,955 comparable items (median $17.99).

Specifications

Product
Brand nameZORO SELECT

Questions about this item

Which class rating suits a 2-1/2 inch pipe system?

This coupling is rated Class 150, matching ASME B16.3 and B16.4 dimensions for 2-1/2 inch FNPT connections.

What does the 300 psi rating mean when the fitting is installed?

It handles up to 300 psi at 150 °F for water, oil or gas, and 150 psi for saturated steam within the same temperature range.

How do the ASME B16.3 and B16.4 standards affect thread compatibility?

They define the FNPT thread form and Class 150 wall thickness, so the coupling threads onto any matching 2-1/2 inch NPT pipe or nipple.

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