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The JOHN GUEST 24502 is a 3/4-inch pressure reducing valve featuring sweat (solder) end connections and integral check valves. Designed for residential and light commercial plumbing systems, this valve reduces incoming supply pressure to a safe, manageable downstream level while the built-in check valves prevent backflow within the same assembly. Licensed plumbers and water system installers are the primary trade for this component. The Hg110-D configuration indicates a valve body suited for standard domestic water service applications where pressure regulation and backflow protection are required in a compact, single-unit form.
This valve is suited for installation on cold water supply lines where high incoming pressure must be stepped down before distribution to fixtures, appliances, or hydronic equipment. The sweat connection style requires soldering to copper pipe, making this a common choice in new construction and retrofit plumbing projects. Its integral check valves eliminate the need for a separately installed check valve in many configurations, simplifying the rough-in.
Designed as an OEM-style replacement or new-installation pressure reducing valve for residential and light commercial copper pipe plumbing systems using 3/4-inch sweat connections.
Installation should be performed by a licensed plumber in accordance with local plumbing codes and the International Plumbing Code (IPC). Shut off the main water supply and relieve system pressure before cutting into any existing line. Sweat connections require proper flux application, a propane or MAPP torch, and lead-free solder per current code requirements. Do not apply torch heat directly to the valve body; solder the fittings with the valve protected from excess heat to avoid damage to internal components.
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