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Malleable iron union fitting, class 150, half inch female NPT threads both ends, matte dark metal finish

Value Brand

Value Brand Malleable Iron Union Class 150 1/2 in x 1/2 in Fitting

SKU CH-JMVE-1JQ7S

Malleable iron union rated Class 150 connects two 1/2 in female NPT pipes

  • Malleable iron construction resists corrosion for durable plumbing connections
  • Class 150 pressure rating handles standard residential water supply demands
  • 1/2 inch female NPT threads join matching pipes without adapters
  • Union design allows quick disassembly for maintenance or reconfiguration
  • Zoro Select brand identifies the manufacturer behind the fitting

Malleable Iron Union for 1/2 in Piping

This malleable iron union connects two 1/2 inch female NPT threads in a Class 150 pressure rating. It is intended for plumbers and maintenance technicians who need a removable joint in water, oil or gas lines. The ZORO SELECT branding indicates a standard industrial fitting supplied new.

Verify Thread Type and Pressure Class Before

Confirm that the existing piping uses 1/2 inch female NPT threads and that the system pressure does not exceed the Class 150 rating. The fitting is restricted from sale in certain states, so check local regulations before purchase. Ensure the pipe material is compatible with malleable iron to avoid galvanic corrosion.

Installs Between Two Female NPT Ends for Easy

The union sits between two 1/2 inch female NPT connections, allowing sections of pipe to be separated without rotating the pipe itself. It frees up maintenance time by enabling quick removal of valves, pumps or equipment downstream. The malleable iron body handles standard mechanical loads in typical plumbing installations.

How it compares

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

Price $5.99
Cheaper than about 80% of the 2,955 comparable items (median $17.99).

Specifications

Product
Brand nameZORO SELECT

Questions about this item

Does the ZORO SELECT 5P591 union come with thread sealant or gaskets, or do I need to buy those separately?

The fitting is supplied as the malleable iron union only; pipe thread sealant or gaskets are not included and must be purchased separately.

How do I know the Class 150, 1/2 in NPT version is the right one for my piping system?

Choose this union when your system uses 1/2 inch female NPT threads and requires a Class 150 pressure rating; the 14 threads per inch match standard NPT dimensions.

What does the Class 150 rating mean for everyday pressure in a water line?

Class 150 indicates the union is rated for 150 psi working pressure at ambient temperature, suitable for typical residential and light commercial water lines.

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