Every morning before a household member steps into the shower, the cold water in the hot water pipes has to be expelled before the hot water can arrive at the fixture. If the bathroom is a good distance from the water heater, that represents a lot of wasted water. In fact, for the average four-person dwelling, this can amount to 20,000 liters of water down the drain each year. The same applies to kitchen sink faucets. Considering the size of today’s homes, there is often a significant amount of cool water sitting in hot water pipes that run through ceilings and down wall cavities.
A water recirculation pump re-circulates the water from the hot water line to the cold water line and back to the hot water heater. This keeps the water hot and ready for immediate distribution to the fixture without water waste.