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Bronze swing Y check valve, 2-1/2 inch FNPT connections, Y-pattern body

Milwaukee Valve

Milwaukee Valve 509Y 2-1/2" FNPT Bronze Swing Y Check Valve

SKU CH-M71Q-36ARM

A bronze swing Y check valve with FNPT connections for 2-1/2 inch pipe, rated to 200 psi at 150 Degrees F and 192 gpm flow

  • Bronze construction resists corrosion for long service life
  • Y-pattern swing design allows horizontal or vertical mounting
  • 192 gpm flow capacity handles high-demand systems
  • 200 psi water pressure rating at 150 °F ensures reliable operation
  • 125 psi steam rating supports heating applications

Product Identity

This Milwaukee Valve 509Y is a 2-1/2 inch FNPT bronze swing Y check valve designed for piping systems requiring backflow prevention. It suits commercial and industrial installations handling water or steam where a full-port Y-pattern body is specified.

Suitable Applications

Installers needing a bronze valve rated for 200 psi water pressure at 150 degrees F and 125 psi steam will find this model appropriate. It is not intended for systems exceeding 425 degrees F, for services requiring a cracking pressure above .5 psi, or for pipe sizes other than 2-1/2 inch FNPT.

Deciding Specification

The 192 gpm flow capacity at the stated pressure drop is the single figure that confirms whether this valve meets the system demand. Verify the required flow rate against this number before selecting the part.

How it compares

Measured against everything we stock in Faucet Valves & Replacement Parts, at today’s prices. Recalculated every night.

Price $389.99
Pricier than about 90% of the 1,132 comparable items (median $54.99).

Specifications

Product
Brand nameMILWAUKEE VALVE
Product typeOther

Questions about this item

What size FNPT pipe threads must my existing plumbing have to connect this 2-1/2" bronze check valve?

Your piping needs 2-1/2 inch FNPT female threads on both ends to match the valve's FNPT x FNPT connection type.

Will the 0.5 psi cracking pressure allow flow in a low-head gravity system alongside older bronze valves?

Yes, the 0.5 psi cracking pressure opens with minimal head pressure, so it works with older bronze valves in gravity-fed or low-pressure layouts.

How can I confirm the swing disc is sealing properly after I install the valve horizontally?

Pressurise the line up to 200 psi at 150 °F; no downstream leakage means the bronze seat is sealing as intended.

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