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Bronze inline swing check valve with FNPT threaded ends

Milwaukee Valve

Milwaukee Valve UP509 1 1/2" Bronze Spring Check Valve

SKU CH-K9AM-NXKZS

Threaded bronze check valve with a 0.750 to 1.000 psi cracking pressure handles 76 gpm at 300 psi and 150 °F

  • TypeOther
  • Low-lead bronze body meets potable-water standards
  • 76 gpm flow capacity handles high-demand supply lines
  • 300 psi rating at 150 °F suits demanding commercial systems
  • Operates from -20 °F to 200 °F for year-round reliability
  • Cracking pressure of .750 to 1.000 psi prevents backflow with minimal head loss

Spring check valve for 1 1/2" FNPT piping

This Milwaukee Valve UP509 bronze spring check valve fits 1 1/2 inch FNPT x FNPT connections and operates in horizontal mounting orientation. The inline swing mechanism uses a bronze body with brass seat and bronze seal material. It handles water pressure up to 300 psi at 150 degrees Fahrenheit and temperatures from -20 to 200 degrees Fahrenheit.

Cracking pressure range and flow capacity

The valve opens between .750 and 1.000 psi cracking pressure, allowing flow to start at very low differential pressure. Rated flow reaches 76 gpm through the 1 1/2 inch bore, suitable for residential and light commercial plumbing circuits. Bronze construction resists corrosion in potable water systems and the low-lead alloy meets drinking-water safety requirements.

Verify pipe size and pressure rating

Confirm the existing piping uses 1 1/2 inch FNPT threads and that system pressure stays within 300 psi at 150 degrees Fahrenheit. Ensure horizontal installation is possible because the valve is rated for horizontal mounting orientation only. Check that the fluid temperature range of -20 to 200 degrees Fahrenheit covers the intended application, and note the valve is not rated for steam service.

Highlights

  • Low-lead bronze body meets potable-water standards
  • 76 gpm flow capacity handles high-demand supply lines
  • 300 psi rating at 150 °F suits demanding commercial systems
  • Operates from -20 °F to 200 °F for year-round reliability
  • Cracking pressure of .750 to 1.000 psi prevents backflow with minimal head loss

Specifications

BrandMILWAUKEE VALVE
TypeOther

Questions about this item

How often will the bronze seat and brass internals need replacement in a 1 1/2" line?

The bronze body and brass seat resist corrosion in potable water; inspection intervals depend on local water chemistry and flow velocity rather than a fixed schedule.

What pressure drop appears first when running 76 gpm continuously?

At the rated 76 gpm the valve sees its design flow limit; sustained operation at that rate keeps pressure loss at the published cracking range of 0.750 to 1.000 psi.

How hot does the body get when passing 150 °F water all day?

The bronze body reaches the fluid temperature of 150 °F and is rated to 200 °F, so surface heat stays within the valve's maximum temperature limit.

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