We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
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"
  • TypeOther
  • 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.

Highlights

  • 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

Specifications

BrandMILWAUKEE VALVE
Size3/8"
TypeOther

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.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.