Originally Posted by sdupp
I give up................. There is a sensor in the pump that senses hot water, then closes the value and turns off the pump. All it did was pump the cold water laying in the hot water line into the cold water line. So therefore NO Hot water was pumped into the cold water line....
When the hot water reaches the
D'MAND System, a thermal sensor (thermistor) senses a temperature rise and quickly closes
the zone valve while it shuts the pump off. The sophisticated electronic circuitry that does
this is attached to the high-performance pump housing.
The Metlund D'MAND System can utilize the cold water line as a return line or use a
dedicated return line. By using the existing cold water line, it is easy to retrofit existing
homes or businesses. Special plumbing is not needed, and since the System will not allow for
hot water to cross over to the cold water line, all the cold water fixtures still have cold water.
I guess my question would be the time factor not the energy savings. If before you had to run i gal. of water down the drain to get hot water, and maybe this took 1 min. Is this pump big enough to pump water fast enough to cut the time factor by 80%?
Now if some one else in the house was using any cold water, the water you are trying to pump back to the heater is going to the person using the cold water, because of the pressure from the supply?
I think for that kind of money i would rather install a recirculating pump, insulate my water lines and then i would have hot water every where real
If you had a basement i would make it a gravity flow system which needs no pump. I have installed several systems like that. Paul