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Small bronze inline spring check valve with threaded ends

Milwaukee Valve

Milwaukee Valve UP548T 3/8" Bronze Spring Check Valve

SKU CH-X0CZ-AXVXP

Inline spring check valve with bronze body and FNPT connections, rated to 250 psi at 150 °F and operating from -20 °F to 353 °F

  • TypeOther
  • Low-lead bronze body protects drinking water safety
  • Inline spring design prevents backflow automatically
  • Rated 250 psi at 150 °F for reliable pressure handling
  • Operates from -20 °F to 353 °F across seasonal extremes
  • 3/8" FNPT threaded ends install without special tools

Product Purpose

The Milwaukee Valve UP548T is a 3/8 inch threaded bronze spring check valve designed for plumbing systems that require automatic backflow prevention. It suits installers and maintenance teams working on water lines where a compact inline valve with female NPT connections is specified.

Sustained Operation

The valve body and spring are both bronze with bronze seats, rated for continuous water service up to 250 psi at 150 degrees F and temperatures from -20 to 353 degrees F. The inline spring mechanism maintains closure under steady pressure differentials and resists debris buildup during long-term horizontal installation.

Decisive Specification

The cracking pressure range of .750 to 1.000 psi determines whether this valve will open at the low head pressures present in your circuit. If the system cannot reliably exceed 1 psi differential the valve may remain closed and block flow.

Highlights

  • Low-lead bronze body protects drinking water safety
  • Inline spring design prevents backflow automatically
  • Rated 250 psi at 150 °F for reliable pressure handling
  • Operates from -20 °F to 353 °F across seasonal extremes
  • 3/8" FNPT threaded ends install without special tools

Specifications

BrandMILWAUKEE VALVE
TypeOther

Questions about this item

How much heat can the bronze spring check valve handle in continuous service?

It is rated for a maximum temperature of 353 degrees Fahrenheit and a minimum of -20 degrees Fahrenheit.

What pipe fittings are needed to install this 3/8-inch FNPT check valve?

You need mating 3/8-inch male NPT threads on both sides of the line.

Will the 0.75 to 1.0 psi cracking pressure work with a low-pressure gravity-fed system?

The spring opens between 0.75 and 1.0 psi, so it suits low-head installations.

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