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Bronze Y-pattern swing check valve with FNPT threads

Milwaukee Valve

Milwaukee Valve 508 1-1/2" FNPT Bronze Swing Y Check Valve

SKU CH-F8ZV-KFPG5

Bronze Y-swing check valve with FNPT ends, 0.5–0.75 psi cracking pressure, rated 400 psi at 150 °F and up to 550 °F

  • Size1 1/2"
  • TypeOther
  • Y-pattern swing design reduces flow resistance and turbulence
  • Bronze body with chrome-cobalt seal resists corrosion and wear
  • Rated for 400 psi water pressure at 150 °F service temperature
  • Operates reliably from -20 °F up to 550 °F
  • Low cracking pressure of .500 to .750 psi opens with minimal backflow

Bronze Y Swing Check Valve

The Milwaukee Valve 508 is a 1-1/2 inch FNPT bronze check valve with a Y swing design. It prevents backflow in horizontal piping systems using a chrome-cobalt seal. The valve operates between -20 and 550 degrees Fahrenheit and handles up to 400 psi at 150 degrees Fahrenheit. It suits plumbing and hydronic installations requiring reliable non-return flow control.

Replaces basic swing checks

This model upgrades from standard inline swing checks by using a Y-pattern body that reduces pressure drop and turbulence. The cracking pressure of .500 to .750 psi allows the disc to open with minimal flow resistance. The jump is worth it when horizontal runs need tighter shutoff and longer seal life in high-temperature water or steam service.

Limited to horizontal mounting

The valve must be installed horizontally to function correctly; vertical or angled orientation will prevent proper disc seating. FNPT threads require compatible female pipe threads on both ends for a sealed connection. The bronze body and chrome-cobalt trim resist corrosion but are not rated for pressures above 400 psi or temperatures beyond 550 degrees Fahrenheit.

Highlights

  • Y-pattern swing design reduces flow resistance and turbulence
  • Bronze body with chrome-cobalt seal resists corrosion and wear
  • Rated for 400 psi water pressure at 150 °F service temperature
  • Operates reliably from -20 °F up to 550 °F
  • Low cracking pressure of .500 to .750 psi opens with minimal backflow

Specifications

BrandMILWAUKEE VALVE
Size1 1/2"
TypeOther

Questions about this item

What pipe size and thread type does the 1-1/2" FNPT bronze swing Y check valve require for installation?

The valve connects to 1-1/2 inch piping using FNPT x FNPT female National Pipe Thread connections on both ends.

How must the valve be oriented during installation, and what is the common mistake to avoid?

Mount the valve horizontally as specified; installing it vertically or upside-down will prevent the swing mechanism from operating correctly.

When should the chrome-cobalt seal be inspected or replaced given the 0.500 to 0.750 psi cracking pressure?

Inspect the seal if the valve fails to close at the rated cracking pressure or shows leakage during routine system checks at up to 400 psi.

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