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

Milwaukee Valve

Milwaukee Valve 515Y 1/4" Swing Y Check Valve 2.25 in

SKU CH-M7AS-JXREH

A 1/4-inch bronze swing Y check valve with 0.5 psi cracking pressure, 3.3 gpm flow, and 300 psi water rating

  • Size1/4"
  • TypeOther
  • Prevents backflow with a 0.5 psi cracking pressure
  • Bronze body and seat withstand 425 °F and -20 °F
  • Rated 300 psi water and 150 psi steam at 150 °F
  • Delivers 3.3 gpm full flow through a 1/4" FNPT Y-pattern
  • Compact 2.25 in length fits tight horizontal or vertical runs

1/4" Bronze Swing Y Check Valve

The Milwaukee Valve 515Y is a 1/4 inch bronze check valve designed for plumbing and light industrial piping. It suits installers who need a compact non-return device with female NPT threads on both ends. The Y-pattern body allows horizontal or vertical mounting. It is not for systems requiring a larger bore or a different cracking pressure.

3.3 gpm flow with 0.5 psi cracking pressure

The valve delivers a full-flow rate of 3.3 gallons per minute once the 0.5 psi cracking pressure is overcome. It handles water up to 300 psi at 150 degrees Fahrenheit and steam up to 150 psi WSP. Temperature limits span -20 to 425 degrees Fahrenheit. It runs out of capacity in high-volume lines or where a lower cracking pressure is specified.

Bronze seat and seal integrated into body

The bronze seat and seal are part of the one-piece bronze body, so there are no separate gaskets to stock or replace. This reduces leak paths and simplifies maintenance schedules. The integrated design does not help applications needing field-replaceable soft seats or elastomer seals for chemical compatibility.

Highlights

  • Prevents backflow with a 0.5 psi cracking pressure
  • Bronze body and seat withstand 425 °F and -20 °F
  • Rated 300 psi water and 150 psi steam at 150 °F
  • Delivers 3.3 gpm full flow through a 1/4" FNPT Y-pattern
  • Compact 2.25 in length fits tight horizontal or vertical runs

Specifications

BrandMILWAUKEE VALVE
Size1/4"
TypeOther

Questions about this item

Will the 1/4" FNPT threads on this 515Y valve mate with the existing bronze piping in my older plumbing system?

Yes, the 1/4" FNPT x FNPT connections are standard tapered pipe threads compatible with existing bronze piping of the same nominal size.

How can I verify the swing check mechanism is operating correctly after installation?

Observe flow direction; the valve permits 3.3 gpm full flow forward and should close automatically against backflow with a .5 psi cracking pressure.

Does the 515Y valve package include pipe sealant or thread tape for the FNPT connections?

The valve body is bronze with bronze seat and seal materials; pipe sealant or thread tape for the 1/4" FNPT connections must be purchased separately.

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