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Bronze swing-check valve with Y-pattern body, 3/8 inch FNPT ends, 2.25 inch overall length

Milwaukee Valve

Milwaukee Valve 515Y 3/8" Swing Y Check Valve 2.25 in

SKU CH-A0YY-BY4CA

Bronze Y-pattern swing check valve with FNPT connections, 0.5 psi cracking pressure, rated 300 psi at 150 °F and 150 psi steam, operating from -20 °F to 425 °F

  • Size3/8 in
  • Y-swing design allows full 6 gpm flow
  • Bronze body and seat handle 425 °F max temperature
  • Rated for 300 psi water pressure at 150 °F
  • 5 psi cracking pressure opens with minimal back-pressure
  • FNPT x FNPT ends suit 3/8 in pipe connections

3/8" Bronze Swing Y Check Valve

This Milwaukee Valve 515Y check valve uses a bronze body with FNPT connections for 3/8 inch pipe. The Y-pattern swing design allows horizontal or vertical mounting while maintaining full flow. It suits plumbing and low-pressure steam systems that need reliable backflow prevention.

Replaces basic swing or lift checks

The Y-pattern body reduces turbulence compared with straight-pattern valves, so the upgrade is worth it when noise or pressure drop from a standard swing check is a concern. It also replaces lift checks that can stick in sediment-laden water because the hinged disc swings clear of the flow path.

Handles 6 gpm water at 300 psi

The valve delivers full flow up to 6 gallons per minute with a low .5 psi cracking pressure. Bronze seats and seals withstand water to 300 psi at 150 °F and steam to 150 psi. Temperature limits reach 425 °F maximum and -20 °F minimum, so it runs out of headroom above those pressures or temperatures.

How it compares

Measured against everything we stock in Bath Accessories & Soap Dispensers, at today’s prices. Recalculated every night.

Price $62.99
Pricier than about 62% of the 1,499 comparable items (median $39.99).

Specifications

Product
Brand nameMILWAUKEE VALVE
Product typeOther
Size & build
Size3/8 in

Questions about this item

What size pipe threads does the 3/8" swing Y check valve use?

The valve connects with 3/8 inch FNPT female threads on both ends.

Which orientation should the Y-pattern body be installed in for proper swing operation?

Mount the valve horizontally or vertically so the disc swings freely; installing it upside-down will prevent the check mechanism from working.

How often should the bronze seat and disc be inspected for wear?

Inspect the bronze seating surfaces annually; replace the valve if the seat shows erosion or the disc no longer seals at the rated 0.5 psi cracking pressure.

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