ACT-303-BTW
How The 
System Works:
The 
pump is installed under the
sink or faucet farthest from the water heater -- where hot water
usually takes the longest amount of time to arrive.
A built-in temperature sensor automatically turns the pump on when the water temperature
in the hot water supply line cools down to 85º F. This cool water
in the hot water supply line is then pumped into the cold water line
and back into the water heater.
The pump turns off automatically when
the hot water supply line to the faucet reaches 95º F, ensuring
the instant availability of shower warm water with maximum temperature
hot water only seconds behind. When the pump is automatically turned
off by the built-in thermostat, an auto closure device prevents hot or
cold water from mixing in either supply line.
Hot water will also be instantly available at all other faucets in
the supply line between the water heater and the faucet where the pump is installed.
