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Small bronze Y-pattern check valve with threaded ends, 2.25 inches long

Milwaukee Valve

Milwaukee Valve 509Y 1/4" Swing Y Check Valve 2.25 in

SKU CH-53J0-6976X

Bronze swing Y check valve with 1/4" FNPT connections, 3.3 gpm flow and 200 psi water rating

  • Size1/4"
  • TypeOther
  • Prevents backflow with a 0.5 psi cracking pressure
  • Bronze body handles 425 °F max temperature
  • Rated for 200 psi water pressure at 150 °F
  • Delivers 3.3 gpm full flow through Y-swing design
  • Installs horizontally or vertically with FNPT connections

1/4" Bronze Y Swing Check Valve

This 1/4-inch bronze check valve uses a Y-pattern swing design with FNPT connections. It suits residential and light-commercial plumbing where reliable back-flow prevention is required. The compact 2.25-inch overall length fits tight piping runs. Horizontal or vertical mounting gives installers flexibility.

Sustained pressure and temperature performance

The valve handles up to 200 psi water pressure at 150 degrees F and 125 psi steam working pressure continuously. Bronze body and seat materials maintain seal integrity across a wide range from -20 to 425 degrees F. Full-flow internal geometry delivers 3.3 gpm without excessive pressure drop during extended operation.

0.5 psi cracking pressure

A low .5 psi cracking pressure allows the disc to open with minimal upstream pressure, preventing water hammer in low-head systems. This single specification determines whether the valve will function correctly in gravity-fed or low-pressure circuits. Verify system pressure before selection.

Highlights

  • Prevents backflow with a 0.5 psi cracking pressure
  • Bronze body handles 425 °F max temperature
  • Rated for 200 psi water pressure at 150 °F
  • Delivers 3.3 gpm full flow through Y-swing design
  • Installs horizontally or vertically with FNPT connections

Specifications

BrandMILWAUKEE VALVE
Size1/4"
TypeOther

Questions about this item

How much heat can the bronze swing check valve handle during continuous operation?

The valve is rated for a maximum temperature of 425 degrees F and a minimum of -20 degrees F, so it will handle typical hot-water or steam lines running all day without thermal damage.

What piping and orientation are needed to install the 1/4" FNPT Y-pattern check valve?

You need 1/4-inch female NPT threads on both sides of the pipe run and can mount the valve horizontally or vertically as the flow direction requires.

Will the 0.5 psi cracking pressure work with an older low-pressure gravity-fed system?

Yes, the low 0.5 psi cracking pressure allows the valve to open easily under minimal head pressure, making it compatible with older gravity-fed installations.

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