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Bronze Y-pattern swing check valve with threaded ends, 3.6875 in long

Milwaukee Valve

Milwaukee Valve 515Y 1" Swing Y Check Valve 3.6875 in

SKU CH-P3SN-ZJ2ZF

A 1-inch bronze Y-pattern swing check valve with female NPT connections, rated for 31 gpm flow at 300 psi water and 150 psi steam up to 425 °F

  • Size1"
  • TypeOther
  • Prevents backflow with Y-pattern swing mechanism
  • Handles 300 psi water pressure at 150°F
  • Operates from -20°F to 425°F temperature range
  • Delivers 31 gpm full-flow capacity
  • Installs horizontally or vertically with FNPT connections

Milwaukee Valve 515Y 1" Swing Check

This 1-inch bronze Y-pattern swing check valve installs in horizontal or vertical lines with FNPT connections. The 3.6875-inch overall length fits standard piping layouts without special tools or alignment fixtures.

Installation notes

Threaded ends accept standard pipe dope or tape for a leak-free seal. The .5 psi cracking pressure opens reliably but may not prevent backflow in very low-head gravity systems. Bronze seat and body resist galling during assembly.

Capacity and limits

Rated for 31 gpm full flow at 300 psi water pressure and 150 psi steam. Operating range spans -20 to 425 degrees F, so it handles hot-water and low-pressure steam duties. Above 300 psi water or 150 psi steam the valve exceeds its design envelope.

Highlights

  • Prevents backflow with Y-pattern swing mechanism
  • Handles 300 psi water pressure at 150°F
  • Operates from -20°F to 425°F temperature range
  • Delivers 31 gpm full-flow capacity
  • Installs horizontally or vertically with FNPT connections

Specifications

BrandMILWAUKEE VALVE
Size1"
TypeOther

Questions about this item

How can I confirm the 515Y valve is sealing properly after installation?

Pressurise the line up to 300 psi at 150 °F and verify no leakage past the bronze seat; the valve should open at .5 psi cracking pressure and pass up to 31 gpm.

What comes with the 515Y and what must I supply?

The valve body with FNPT x FNPT threads is included; you must provide 1 in pipe, thread sealant and any mounting hardware.

Which 515Y version suits a 150 psi steam line at 425 °F?

This 1 in bronze Y swing check is rated for 150 psi WSP and 425 °F maximum temperature, matching those conditions.

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