Milwaukee Valve 507 1/4" Swing Y Check Valve 2.25 in

What the product is

The Milwaukee Valve 507 is a 1/4-inch Y-pattern swing check valve with an overall length of 2.25 inches. Its bronze body and bronze seat handle water up to 600 psi at 150 degrees Fahrenheit and steam up to 300 psi WSP. The valve cracks open between 0.750 and 1.000 psi and passes 3.3 gpm. It mounts horizontally or vertically and operates from -20 to 550 degrees Fahrenheit.

Who this suits and who should look elsewhere

This valve suits plumbing or hydronic systems that need a compact bronze check valve with FNPT connections rated for 600 psi water service. It is not for lines larger than 1/4 inch, for applications that require a cracking pressure outside the 0.750 to 1.000 psi range, or for installations that cannot accommodate a 2.25-inch face-to-face dimension. Buyers needing a different connection type or a higher flow coefficient should look elsewhere.

Installation ease and common pitfalls

The FNPT ends thread into standard 1/4-inch female pipe fittings, so installation is straightforward with basic pipe wrenches. The valve accepts horizontal or vertical mounting, but the swing mechanism must be oriented so gravity or flow can lift the disc freely. Common issues include over-tightening the bronze threads, which can crack the body, and installing the valve upside-down in vertical runs, which prevents the disc from opening fully. Ensure the arrow on the body matches the flow direction.