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Bronze inline check valve with FNPT threaded ends

Milwaukee Valve

Milwaukee Valve UP509 3/4" Bronze Spring Check Valve 18 gpm

SKU CH-2345-BMPDD

Bronze spring check valve with 3/4" FNPT connections handles 18 gpm at up to 300 psi and 200 °F

  • TypeOther
  • Reliable backflow prevention with 18 gpm flow capacity
  • Low-lead bronze body meets potable water standards
  • Spring-loaded swing mechanism opens at 0.750 to 1.000 psi cracking pressure
  • Rated for 300 psi at 150 °F and temperatures from -20 °F to 200 °F
  • FNPT threaded connections for straightforward inline installation

3/4" Bronze Spring Check Valve

This Milwaukee Valve UP509 check valve uses a bronze body with a single inline swing mechanism. It connects via 3/4 inch FNPT threaded ends and handles water flow up to 18 gpm. The valve operates between -20 and 200 degrees Fahrenheit with a maximum water pressure of 300 psi at 150 degrees Fahrenheit.

Horizontal mounting with FNPT threads

Installation requires horizontal piping orientation to ensure proper swing mechanism operation. The FNPT x FNPT connections accept standard 3/4 inch pipe threads without special tools. Cracking pressure ranges from .750 to 1.000 psi, so verify system pressure meets this threshold to avoid the valve failing to open.

Residential and light commercial water lines

Suitable for potable water systems needing backflow prevention within the rated temperature and pressure limits. Not rated for steam service, so steam heating loops require a different valve. Builders needing higher flow capacity or vertical installation should consider alternative designs.

Highlights

  • Reliable backflow prevention with 18 gpm flow capacity
  • Low-lead bronze body meets potable water standards
  • Spring-loaded swing mechanism opens at 0.750 to 1.000 psi cracking pressure
  • Rated for 300 psi at 150 °F and temperatures from -20 °F to 200 °F
  • FNPT threaded connections for straightforward inline installation

Specifications

BrandMILWAUKEE VALVE
TypeOther

Questions about this item

How can I confirm the UP509 valve is operating correctly after installation?

Verify water flows freely in the forward direction and stops completely when supply pressure drops below the .750 to 1.000 psi cracking range; no leakage should appear at the FNPT threads.

What comes with the UP509 valve and what extra parts are needed for a 3/4" line?

The valve body is supplied alone; you must provide two 3/4" FNPT pipe nipples or adapters, thread sealant, and any required mounting brackets.

Which capacity should I select for a residential hot-water loop?

The single listed model delivers 18 gpm at 300 psi and 150 °F, matching typical household recirculation needs; no alternative capacities are offered.

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