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Bronze 1-inch swing check valve with threaded ends, 3.25 inches long

Milwaukee Valve

Milwaukee Valve 510T 1" Swing Check Valve 3.25 in

SKU CH-NNY9-S4F4Q

A 1-inch bronze swing check valve with PTFE seals, rated for 31 gpm flow and 300 psi water pressure at 150 °F

  • Size1 in (2.54 cm)
  • Reliable backflow prevention with inline swing-check mechanism
  • Bronze body and PTFE seal withstand 406 °F and 300 psi water pressure
  • Handles up to 31 gpm flow through 1" FNPT connections
  • Operates from -20 °F to 406 °F for versatile installations
  • Low 0.750–1.000 psi cracking pressure opens smoothly in horizontal or vertical lines

Milwaukee Valve 510T 1" Swing Check Valve

The Milwaukee Valve 510T is a bronze inline swing check valve built for plumbing and hydronic systems. It installs horizontally or vertically on 1-inch FNPT threaded pipe. The PTFE seal and bronze seat resist corrosion across a wide temperature range. This valve suits installers who need reliable backflow prevention in water or steam lines.

31 gpm flow capacity at 300 psi water pressure

The single specification that determines fit is the 31 gallons-per-minute flow rating at 300 psi and 150 °F. The cracking pressure sits between 0.750 and 1.000 psi, so the disc opens with minimal head loss. If your system demands a higher flow coefficient or a lower cracking threshold, this valve will not meet the hydraulic requirement.

Handles water to 406 °F and steam to 150 psi WSP

The bronze body and PTFE seal operate continuously from -20 °F to 406 °F in water service up to 300 psi. For saturated steam the limit is 150 psi WSP. Beyond those pressures or temperatures the seat material and body rating are exceeded, so the valve is not suited for high-pressure steam mains or superheated systems.

How it compares

Measured against everything we stock in Bath Accessories & Soap Dispensers, at today’s prices. Recalculated every night.

Price $84.99
Pricier than about 70% of the 1,499 comparable items (median $39.99).

Specifications

Product
Brand nameMILWAUKEE VALVE
Product typeOther
Size & build
Size1 in (2.54 cm)

Questions about this item

What does the 31 gpm flow rating mean for my plumbing system?

The valve allows up to 31 gallons per minute of water flow when fully open, so size your pump and piping to stay within that limit.

How does the FNPT x FNPT connection affect installation?

Both ends have female National Pipe Taper threads, so you will need 1-inch male NPT nipples or adapters to join the valve into the line.

What clearance is required to fit the 3.25-inch overall length?

The valve body measures 3.25 inches from end to end, so allow at least that much straight pipe run plus room for the swing disc to open fully.

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