: This is what they ultimately chose. A small recirculation pump was installed on the return line. To save energy, they added a timer so the pump only ran during the morning and evening "rush hours" when the family was home.
The plumber explained that to have "instant" hot water, they needed a . Instead of the pipe ending at the faucet, it would loop back to the water heater.
The next morning, Mr. Petrov walked into the bathroom, turned the handle, and— poof —steam rose instantly. No more waiting, no more wasted gallons. By adding a simple return loop and a smart pump, their house finally felt modern and efficient.