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Small bronze inline spring check valve with sweat connections

Milwaukee Valve

Milwaukee Valve UP1548T 3/8" Solder Bronze Spring Check Valve

SKU CH-XRA0-8WRDT

Inline spring check valve in low-lead bronze with sweat connections for 3/8-inch copper pipe, rated 250 psi at 150 °F and .750 to 1.000 psi cracking pressure

  • TypeOther
  • Low-lead bronze body meets potable-water requirements
  • Spring-loaded inline design prevents back-flow automatically
  • Operates from -20 °F to 353 °F for wide temperature range
  • Rated 250 psi at 150 °F for high-pressure durability
  • Sweat-to-sweat 3/8 in connections suit copper piping

Purpose and fit

The Milwaukee Valve UP1548T is a 3/8 inch solder bronze spring check valve designed for residential and light-commercial plumbing systems. It prevents reverse flow in horizontal pipe runs where a compact inline device is required.

What the bundle changes

The valve ships as a single unit with sweat-by-sweat connections and a bronze body and seal; no additional gaskets, solder or tools are included. Installers must supply compatible copper tube and flux to complete the joint.

Install difficulty and common issues

The inline spring mechanism allows straightforward horizontal mounting, but the low cracking pressure of .750 to 1.000 psi means debris can hold the disc open if the line is not flushed first. Sweat joints demand clean tube ends and proper heat control to avoid damaging the bronze seat at temperatures up to 353 degrees F. The valve handles a maximum water pressure of 250 psi at 150 degrees F and operates down to -20 degrees F.

Highlights

  • Low-lead bronze body meets potable-water requirements
  • Spring-loaded inline design prevents back-flow automatically
  • Operates from -20 °F to 353 °F for wide temperature range
  • Rated 250 psi at 150 °F for high-pressure durability
  • Sweat-to-sweat 3/8 in connections suit copper piping

Specifications

BrandMILWAUKEE VALVE
TypeOther

Questions about this item

How often should the bronze seat and spring be inspected or replaced on the UP1548T?

Inspect the bronze seat and spring annually for wear or mineral buildup; replace them if the valve no longer seals at the rated 0.750 to 1.000 psi cracking pressure.

What is the first limit reached during continuous hot-water circulation?

The 353 °F maximum temperature rating is the primary limit; sustained operation above this temperature will damage the bronze body and seals.

How much heat does the valve add to the line when it runs all day?

The bronze body conducts line heat but generates none itself; surface temperature will match the fluid up to the 353 °F design maximum.

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