I live in a house built in 1990 that has a hot water circulator pump installed for potable hot water. We have a normal 50 gallon natural gas water tank. The piping is as follows:
cold into tank, hot out of tank to all faucets. Then, at the far end of the house the hot water line continues back where there is a grunfos (forget how to spell it) pump, a 3/4 check valve and then it tees back into the cold line right above the tank.
Here is the problem:
The system does circulate hot water. It is awesome. I have noticed though it is hard to get really hot water (not scalding hot, but really hot) without turning the tempature on the water heater up. The tank is only four years old and is set to the very hot setting. Well, this past week, my blue main water line broke. For the week that I temporarily patched the pipe and installed the new copper line, I had the pump turned off. When the pump is off, i seem to get hotter water, but as a result, it takes forever to get to the faucet.
On many homes that have a similar system, the line that returns to the tank is pumped back into the bottom of the talk where the hose faucet sits. Could my problem be the fact that the pump line is returning the water though the top of the tank using the cold water inlet?
Any other ideas of what might cause this? Thanks for any help!