Monday, August 27, 2012
Get hot water by recirculating pump system
Some recirculation pumps have a thermostat that measures the temperature of the standing water in the pipeline. This measurement is made at the fixture that is furthest from the heater. When the temperature drops below a preset limit, the pump is activated and it pumps water from the heating unit into the line. At the same time the cooled standing water in the line is pumped through the cold line back to the heater. Through this recirculating loop, the pump will provide you with instant hot water whenever you need it.
Hot water recirculation systems generally consist of a pump, an integrated electronic controller, and a zone valve. When the activation button is pushed, or when another type of control turns the system on, the pump starts recirculating cooled water that's been sitting in the hot water line and sends it back to the water heater through the cold water line. When the water reaches a desired temperature a control closes the zone valve and turns off the pump. It is much like turning on the hot water faucet and letting the water run until it gets hot, but instead of the water going down the drain, it is simply returned back to the water heater. When the hot water faucet is turned on, hot water is readily available. The system is designed to provide hot water at the most distant fixture and every fixture in series or close to the main line.