When you hit that button, it triggers the pump below my Master His Sink which cycles water through the hot water piping from the tankless water heater, cycles it back to the cold water lines and then shuts off when it senses the water is hot at the pump. Genius! No more dumping cold water down the drain while waiting for hot! It’s also not washing money by running continuously or on a timer system. Those systems are energy hogs! Check out their website at www.gothotwater.com . This is one of those green building products that everyone loves and is a total no-brainer when you’ve got a long wait for hot water.
The photo above shows the pump in the back of my cabinet. The hardest part of the install is that you need an electrical outlet in your vanity. Easy if you’re remodeling or building new, but a bit more work if it’s a retrofit situation. I’d be willing to bet we save twice as much water with this device than with our High Efficiency Toilets. My wife and I love this system! -Matt Risinger