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Bronze 1/2 inch swing check valve, 2.3125 inches long

Milwaukee Valve

Milwaukee Valve 509 1/2" Swing Check Valve 2.3125 in

SKU CH-0A8T-ZXQAP

Inline swing check valve with bronze body and brass seat handles 10 gpm flow, rated 200 psi at 150 degrees F and 125 psi steam

  • Size1/2"
  • TypeOther
  • Reliable flow control with inline swing mechanism
  • Handles hot water up to 406 °F for demanding systems
  • Rated 200 psi at 150 °F for strong pressure tolerance
  • Low cracking pressure from .750 to 1.000 psi for easy opening
  • Bronze body with brass seat resists corrosion in plumbing lines

Milwaukee Valve 509 Check Valve

The Milwaukee Valve 509 is a 1/2 inch swing check valve designed for plumbing systems that need automatic backflow prevention. Its bronze body and brass seat handle water up to 200 psi at 150 degrees Fahrenheit and steam up to 125 psi. Installers choose it for residential or light commercial lines where a compact inline valve fits the piping layout. It is not for buyers who need a larger port size or a different connection type.

Pressure and Temperature Limits

This valve operates between minus 20 degrees Fahrenheit and 406 degrees Fahrenheit with a cracking pressure range of .750 to 1.000 psi. The FNPT x FNPT threaded ends accept standard 1/2 inch pipe threads for water service up to 200 psi and steam service up to 125 psi. Flow capacity reaches 10 gallons per minute through the inline swing mechanism. Systems that exceed these pressure or temperature ratings require a different valve specification.

Installation Notes

The valve mounts in either horizontal or vertical orientation, giving flexibility during pipe assembly. Thread sealant must be applied to the FNPT connections to prevent leaks at the joints. Over-tightening the bronze body can crack the casting, so installers should use proper wrench technique. The swing disc operates freely only when the valve is installed with the flow arrow pointing in the correct direction.

Highlights

  • Reliable flow control with inline swing mechanism
  • Handles hot water up to 406 °F for demanding systems
  • Rated 200 psi at 150 °F for strong pressure tolerance
  • Low cracking pressure from .750 to 1.000 psi for easy opening
  • Bronze body with brass seat resists corrosion in plumbing lines

Specifications

BrandMILWAUKEE VALVE
Size1/2"
TypeOther

Questions about this item

Which size should I choose for a half-inch pipe system?

The 1/2" FNPT x FNPT connections match standard half-inch pipe threads, so this single size fits the stated pipe or tube size directly.

What does the 10 gpm flow rating mean once the valve is installed?

It indicates the valve can pass up to 10 gallons per minute of water under the rated pressure conditions without exceeding its design limits.

How does the FNPT connection type affect the pressure rating in practice?

The female NPT threads seal with standard pipe fittings, and the valve handles 200 psi water pressure at 150 °F and 125 psi steam pressure within the -20 °F to 406 °F temperature range.

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