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 Y-pattern swing check valve with threaded FNPT ends

Milwaukee Valve

Milwaukee Valve 515Y 1 1/2" FNPT Bronze Swing Y Check Valve

SKU CH-51YJ-6PZC6

Bronze Y-pattern swing check valve with FNPT connections rated for 300 psi water and 150 psi steam up to 425 °F

  • Size1 1/2"
  • TypeOther
  • Bronze body resists corrosion for long service life
  • Y-pattern swing design allows 76 gpm full flow
  • Rated 300 psi at 150 °F for high-pressure water lines
  • Handles steam up to 150 psi WSP in heating systems
  • Operates from -20 °F to 425 °F across diverse installations

1-1/2" FNPT Bronze Swing Y Check Valve

This Milwaukee Valve 515Y check valve uses a bronze body and bronze seat with a Y-pattern swing mechanism. It fits 1-1/2 inch FNPT threaded connections and is rated for water service up to 300 psi at 150 degrees F and steam service up to 150 psi WSP. The valve operates between -20 degrees F and 425 degrees F with a cracking pressure of 0.5 psi.

Horizontal and vertical mounting orientation limits

The valve supports both horizontal and vertical installation orientations for system flexibility. Its pressure ratings apply specifically at the stated temperatures; exceeding 150 degrees F for water or the 150 psi WSP steam limit reduces the safety margin. Full flow design delivers 76 gpm capacity through the bronze internals without a restricted seat.

Replaces worn bronze swing check valves

Installers choose this model when an existing bronze Y-pattern check valve leaks, chatters or fails to close at low pressure differentials. The 0.5 psi cracking pressure suits gravity-fed and low-head pump circuits where higher cracking pressures would stall flow. It is not for systems requiring silent closing, soft-seat sealing or non-bronze trim materials.

Highlights

  • Bronze body resists corrosion for long service life
  • Y-pattern swing design allows 76 gpm full flow
  • Rated 300 psi at 150 °F for high-pressure water lines
  • Handles steam up to 150 psi WSP in heating systems
  • Operates from -20 °F to 425 °F across diverse installations

Specifications

BrandMILWAUKEE VALVE
Size1 1/2"
TypeOther

Questions about this item

What size should I choose for a 1-1/2" FNPT pipe run?

This valve is built for a 1-1/2" FNPT x FNPT connection, so it matches that exact pipe size without adapters.

How much water can pass through the 76 gpm full-flow rating in my system?

The valve delivers 76 gpm at full flow, and the Y-swing design keeps pressure drop low across that volume.

What does the 0.5 psi cracking pressure mean for my installation?

The disc opens at just 0.5 psi, so flow starts almost immediately in both horizontal and vertical mounting orientations.

Also in this aisle

People compared these

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