Water Heater Recirculation Pump Diagram

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.

Water heater recirculation pump diagram.

Ao smith 2018 a. Step c disconnect the hot water heater at the hot water discharge. 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. 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. 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. Choose your country. 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 recirculation line is a separate water pipe that runs off the hot water line from the farthest plumbing fixture back to the water heater. 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. The pump should be installed so that the pump is pumping away from the hot water heater towards the house. 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.

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