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Malleable iron union fitting, 1/4 inch FNPT, Class 150

Value Brand

Value Brand 5P589 Union 1/4" FNPT Malleable Iron Class 150

SKU CH-PM9Y-RBX71

A malleable iron Class 150 union with 1/4" female NPT threads for plumbing connections

  • Malleable iron construction withstands demanding plumbing conditions
  • Class 150 rating supports standard pressure requirements
  • 1/4 inch FNPT threads ensure secure pipe connections
  • Female NPT design simplifies installation in tight spaces
  • Zoro Select brand delivers reliable fitting performance

Union Fitting For 1/4 Inch Pipe

This malleable iron union connects two sections of 1/4 inch female NPT piping. It is rated for Class 150 service and suits plumbing, compressed air or hydraulic installations. The union design allows quick disassembly for maintenance without cutting pipe.

Thread And Pressure Compatibility

Verify that both mating ports are 1/4 inch female NPT before ordering. Confirm the system operating pressure stays within the Class 150 rating for malleable iron at your working temperature. Ensure the pipe schedule and sealant used are appropriate for the thread type.

Sustained Pressure Behaviour

The Class 150 malleable iron body maintains its seal under continuous rated pressure without the creep seen in lower-class fittings. Repeated make-and-break cycles do not degrade the ground joint faces when proper thread sealant is reapplied each time. The union nut resists loosening from vibration in long-run service.

Highlights

  • Malleable iron construction withstands demanding plumbing conditions
  • Class 150 rating supports standard pressure requirements
  • 1/4 inch FNPT threads ensure secure pipe connections
  • Female NPT design simplifies installation in tight spaces
  • Zoro Select brand delivers reliable fitting performance

Specifications

BrandZORO SELECT

Questions about this item

What is included with the Value Brand 5P589 Union and are any additional components required for installation?

The package contains the malleable iron union with 1/4 inch female NPT threads on both ends. Pipe thread sealant or tape and the mating pipe nipples must be purchased separately to complete the joint.

How do I choose the correct version of this Class 150 union for my piping system?

Select this model when you need a 1/4 inch female NPT connection rated for Class 150 service. Verify that the system pressure and pipe schedule match the Class 150 rating before ordering.

What does the Class 150 rating mean once the union is installed in a real piping system?

Class 150 indicates the maximum non-shock working pressure the malleable iron body can handle at standard temperatures. The 1/4 inch female NPT threads must be properly sealed to maintain that rating in service.

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