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
3/4 inch bronze spring check valve silver finish

Milwaukee Valve

Milwaukee Valve UP548T 3/4" Bronze Spring Check Valve

SKU CH-381P-T98WD

Bronze spring check valve with 3/4" FNPT connections, 0.750 to 1.000 psi cracking pressure and 250 psi at 150°F water rating

  • TypeOther
  • Low-lead bronze construction for safer potable water
  • Inline spring design ensures reliable backflow prevention
  • Rated to 250 psi at 150°F for demanding installations
  • Operates from -20°F to 353°F across extreme conditions
  • Cracking pressure of .750 to 1.000 psi opens with minimal flow

Product identity

The Milwaukee Valve UP548T is a 3/4 inch threaded bronze spring check valve built for low-lead plumbing systems. Its inline spring mechanism allows flow in one direction while preventing backflow automatically. Bronze body and seat materials suit potable water lines and general hydronic circuits. The valve carries a maximum water pressure rating of 250 psi at 150 degrees Fahrenheit.

Suitable installations and limits

This valve fits horizontal piping runs where a cracking pressure between .750 and 1.000 psi is acceptable. Installers working with steam systems should look elsewhere because the component carries no steam pressure rating. Applications demanding vertical mounting or higher temperature limits beyond 353 degrees Fahrenheit will need a different design.

Sustained duty behaviour

Under continuous operation the bronze construction resists corrosion while the spring maintains consistent closing force across the -20 to 353 degree Fahrenheit range. The 250 psi pressure ceiling at 150 degrees Fahrenheit remains stable during extended service, and the low-lead bronze seat preserves sealing integrity without degradation over long periods.

Highlights

  • Low-lead bronze construction for safer potable water
  • Inline spring design ensures reliable backflow prevention
  • Rated to 250 psi at 150°F for demanding installations
  • Operates from -20°F to 353°F across extreme conditions
  • Cracking pressure of .750 to 1.000 psi opens with minimal flow

Specifications

BrandMILWAUKEE VALVE
TypeOther

Questions about this item

Does the 3/4" FNPT threaded connection require matching male-threaded pipe or fittings?

Yes, the valve has female NPT threads on both ends, so you must supply 3/4" male-threaded pipe or adapters to install it.

Will the 0.750–1.000 psi cracking pressure allow flow with a low-pressure gravity-fed tank?

The spring opens between 0.750 and 1.000 psi, which is roughly 1.7 to 2.3 feet of head; many gravity systems fall below that threshold.

How can I confirm the bronze spring check valve is sealing properly after installation?

Pressurize the line to operating pressure, then watch for zero downstream flow and no leakage at the 3/4" FNPT joints.

Also in this aisle

People compared these

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