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The MCGUIRE LFST04 is an angle supply stop valve designed for residential and light commercial plumbing installations. It features a 1/2-inch IPS inlet connection and a 1/2-inch OD compression outlet, making it a standard configuration for connecting fixture supply lines to water supply rough-in. The wheel handle provides manual shutoff control and allows for straightforward operation without special tools. Licensed plumbers and experienced service technicians install this type of stop valve during fixture rough-in, remodel work, and fixture replacement.
This angle stop is suited for use under sinks, at toilets, and at other plumbing fixtures where a 90-degree change of direction is needed between the wall supply stub-out and the fixture supply line. The IPS inlet threads onto a standard 1/2-inch iron pipe size stub-out, while the compression outlet accepts standard 1/2-inch OD supply tubing. It is a common replacement stop in residential bathroom and kitchen applications.
Designed as an OEM-style replacement angle stop for residential plumbing fixtures requiring a 1/2-inch IPS x 1/2-inch OD compression supply stop configuration.
Installation should be performed by a licensed plumber or qualified tradesperson in accordance with local plumbing codes and the IPC. Shut off the main water supply and relieve line pressure before removing the existing stop valve. Apply thread sealant tape to the IPS inlet threads and hand-tighten before using a wrench for final seating. Do not overtighten the compression fitting nut, as excessive force can damage the ferrule and cause leaks.
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