Water Heater Recirculation Pump Diagram

Hot water recirculation pumps can be located either at the water heater itself or at a point of use fixture in the building and either timer aquastat driven or on demand aquastat.

Water heater recirculation pump diagram.

Domestic circulating water heaters. A pump at the water heater moves hot water through the recirculation line. If the hot water is not used it simply returns back to the tank. The recirculating pump keeps hot water moving through your home s hot water pipes at all times on demand or set for specific hours via a timer different from a water heater timer.

Choose your country. See picture 1 step d install pump onto the water heater discharge using the 3 4 female fi tting and gasket supplied on the pump. Pump at the water heater dedicated return line pumps located at the water heater are suitable for installations with a pre installed hot water return line. A recirculation line is a separate water pipe that runs off the hot water line from the farthest plumbing fixture back to the water heater.

Back to product literature piping diagrams commercial electric heat pump commercial tank type electric commercial tank type gas commercial tankless domestic circulating water heaters residential piping diagrams a. A check valve must be installed in the line to ensure hot water. If you live in a house on a slab or where a majority of the hot water lines drop below the water heater you need to use a recirculating water pump. Ao smith 2018 a.

If you purchase a grundfos recirculating pump like the one just below you don t need to add any extra piping.