View Full Version : hot water recirc loop

09-29-2005, 08:24 PM
installed a gravity hot water recirc loop and now it seems my hot water supply runs out much faster than it used to. I have the pipe insulated, it is 3/4 inch all the way back to heater. do I need to install a check valve, or what? The hot water comes almost instant but runs out too quick. can anyone help? Thank you.

09-30-2005, 06:34 AM
Without a check valve at the heater, the cold water in the bottom of the tank will backflow and give you cold or cool water at the faucet.

10-01-2005, 08:16 AM
installed check valve at heater, everything ok now, thanks.