On-demand zone valve recirculation system

Fluid handling – With heating or cooling of the system – Hot and cold water system having a connection from the hot...

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126362, 137563, 417 32, F24H 100

Patent

active

058294759

ABSTRACT:
A zone valve hot water recirculation system in accordance with the present invention generally includes a hot water source, such as an electric or gas water heater, a conduit for enabling circulation of hot water from hot water source to one or more plumbing fixtures and recovery of water to the hot water source, a pump for accelerating delivery of hot water to the fixtures and, importantly, a zone valve for preventing flow of water into the hot water source during standby periods of the hot water source. A controller, which may include an electronic timer, is provided for causing the zone valve to open and close and the pump to start and stop.

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