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The WEBSTONE 72544 is a male iron pipe (MIP) differential pressure bypass valve sized at 1 inch. Differential pressure bypass valves maintain a minimum pressure differential across a hydronic heating or cooling distribution system by diverting excess flow back to the supply or return main. This keeps variable-speed pumps and zone control systems operating within design parameters and prevents deadheading when zone valves close. Licensed plumbers and hydronic system technicians are the typical installers for this type of valve in commercial and residential hydronic applications.
The WEBSTONE 72544 fits hydronic piping systems where differential pressure control is required across a variable-flow loop. Common installations include multi-zone hot water heating systems, chilled water distribution systems, and radiant floor heating circuits that use zone valves or thermostatic radiator valves. The 1-inch MIP end connection suits standard threaded pipe configurations found in both residential and light commercial mechanical rooms.
Designed as an OEM-style replacement or new-installation bypass valve for 1-inch threaded hydronic piping systems requiring differential pressure regulation.
Installation should be performed by a licensed plumber or qualified hydronic system technician. Shut down and depressurize the hydronic system and allow it to cool before removing or installing any valve. Pipe dope or PTFE tape appropriate for hydronic service should be applied to all threaded connections. Installation must conform to local plumbing codes and applicable sections of the International Plumbing Code (IPC).
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