Milwaukee Valve UP1509 1 1/2" Sweat Bronze Spring Check Valve

Bronze inline swing check valve

The Milwaukee Valve UP1509 is a 1 1/2 inch sweat connection check valve built from low-lead bronze for potable water lines. Its inline swing mechanism allows flow in one direction while automatically preventing backflow in residential and commercial plumbing systems. The bronze body and brass seat resist corrosion across a wide temperature range. Installers needing a reliable non-return valve for copper tubing will find it suited to the task.

Thermals noise and power draw

This mechanical valve has no electrical components, so it produces no noise and draws no power during operation. The bronze construction handles fluid temperatures from -20 to 200 degrees Fahrenheit without degradation. It withstands water pressure up to 300 psi at 150 degrees Fahrenheit while maintaining a tight seal. The cracking pressure sits between .750 and 1.000 psi, ensuring the disc opens only when sufficient flow is present.

Build fit and clearance

The sweat-by-sweat ends join directly to 1 1/2 inch copper pipe using standard soldering techniques, requiring no threaded adapters or flanges. Horizontal mounting orientation is specified, so the valve must be positioned accordingly in the piping layout. Its inline swing design keeps the flow path straight, minimizing pressure drop and preserving the 76 gpm capacity through the line. The bronze body eliminates the need for dielectric unions when connecting similar metals.