A hot water recirculation system is a continuous loop of slow-moving warm water that constantly circulates hot water through the pipes from the hot water heater to the furthest fixture. The water is always hot in the pipes and no water is wasted during the wait. As water begins to cool in the hot water line, the recirculation pump will then move the hot water from the heater throughout the pipe back to the hot water heater, creating a continual move of water that is instantly available for use with no waste.
A hot water recirculation systems is a plumbing system that moves hot water to fixtures quickly without waiting for the water to get hot. Rather than relying on low water pressure, common in most water lines, recirculating systems rapidly move water from a water heater to the fixtures.
The traditional hot water recirculation system uses a dedicated return line from the point of use located farthest from the hot water tank back to the hot water tank. In homes where this return line was not installed the cold water line is used as a return line with a temperature control device closing the connection between the hot and cold lines at a set temperature. Compared to a dedicated return line, using the cold water line as a return has the disadvantage of potentially heating the cold water pipe (and the contained water).
Today I stumbled on a website with a hot water recirculation system that I had never heard of before, the Astro Express System, manufactured by Armstrong. It looks very similar to the Grundfos Comfort system. These systems are touted for solving your slow hot water problem.
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The innovative product design provides a controlled hot water recirculation system for tankless water heaters. The benefits of tankless water heater systems are increased by adding the luxury and convenience of instant hot water at all fixtures in the home thus providing your customer with a true instant hot water system.
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