Think of it this way, when you usually let the cooled off hot water run down the drain until hot water arrives at your faucet, the cooled off water in your hot water pipes has now been replaced with hot water. With the hot water recirculation valve, the cooled off water is simply sent back to the water heater (through your existing plumbing’s cold water line) while it is being replaced with fresh hot water. The result is hot water with very little wait time, usually within 6-seconds.
Install a temperature controlled hot water recirculation valve, which provides instant hot water (so water is not wasted down the drain waiting for water to run hot at your faucet or shower). This simple eco friendly DIY installation (no water pump required) can save an average household up to 17,000 gallons per year. It also saves energy costs and can prevent pipe freezing.