Re: Hot Water to the End of a Long Pipe Run
Posted by Jim DeBruycker on May 18, 2004 at 21:26:09:
In response to Re: Hot Water to the End of a Long Pipe Run
go to and look at their product called D'Mand. It is a simple on-demand water circulator. Basically, it is a pump and controller thatis installed, typically, at the sink furthest from the water heater. When you want hot water, you press a button. This turns on the pump. The pump pushes water from the hot water line back to the water heater through the cold water pipe until a sensor detects that the water is getting warm, then it shuts off. No water is run down the drain, the system "bridges" the hot and cold water lines momentarily, and pumps the hot water source back to the hot water heater through the supply line until it gets hot.

They also sell an optional remote comtrol that you can use to activate the pump so you can have hot water elsewhere. If the supply was split, and you wanted to do this on two ends of the house (i.e., the water heater was in the middle), you'd need two of these.

If you had access, you could run a dedicated line back to the water heater from the furthest point. Note, the water in the cold line gets warm while it is circulating, but never hot. Once the sensor detects the rise (i.e., you have warm water getting to the sink - hot should be close behind!), the pump shuts off.

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