Hot Water Heater Recirculation Pump Diagram

These need to be removed if you want a gravity loop to work.

Hot water heater recirculation pump diagram.

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. A check valve must be installed in the line to ensure hot water. With this option an additional pipe that is designated for hot water is installed in your home s plumbing. Homes that have on demand or tankless water heaters this is significant since otherwise it would be a bit of a wait before the cold water clears out of the pipes and the hot water reaches you.

There are two types of hot water recirculation. The check valves are mandated to preserve energy in non insulated piping scenarios. Any cold water in the recirculation line is returned to the heater. Modern water heaters have small rubber flapper check valves in the top of the heater.

In this way the hot water plumbing pipes remain filled with hot water and you do not have to wait to use hot water. It is designed to provide hot water on demand. Of course this negatively impacts the water flow rate. Sometimes hot water recirculation pumps have small motors which are unable to produce sufficient head pressure.

The second part is a piece called a sensor valve that is placed under the sink that is furthest away from your water heater this is because theoretically this faucet should be the coldest one. There are two main components to an effective hot water recirculating system. Two types of recirculating pumps option 1 full recirculating pump system. A hot water recirculating pump is convenient and adds comfort as it means getting hot water faster when you turn on the hot tap.

The recirculating pump installed on the hot water discharge line of your home s water heater and the sensor valve installed on the supply lines of a faucet at the farthest distance from the water heater. A hot water recirculating pump works by keeping the hot water in your pipes readily available. Back to product literature piping diagrams commercial electric heat pump commercial tank type electric commercial tank type gas commercial tankless domestic. 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.

If you don t remove these flappers the water can t move through the loop. Hot water recirculation systems also known as hot water pumps. Some pumps may in fact not have ample power to activate a tankless water heating system. If the hot water is not used it simply returns back to the tank.

Water heater heat traps.