Just had a recirculating pump installed. I have only a trickle of hot water at the single handle control faucet where the return line is attached when I turn off the cold water supply. What could be the cause? Is the faucet bad or do we need some kind of valve? Cold water mixes at the faucet and sends cold down the return line no matter if pump is on or not.
Plumbing – No hot water in faucet where return line for recirculating pump is installed
plumbing-fixture
Related Solutions
If you live in a hard water area or have galvanized pipes try this:
- Turn off the water supply at sink stops
- Remove the handle and the nut that holds the cartridge
- Pull the cartridge and make sure to not lose the parts
- Clean the cartridge
- With hand over the valve top, slowly crack open water to flush
- Put it all back together
- Repeat on the other side
I have found everything from rust, pebbles, pipe thread tape, and sand in valve stems since the orifices are so small they clog easily. I hope that is it. Good luck. ☺
The braided hose is attached to the black plastic fitting with a push-fit connector.
The locking part is inside the brass 'ferrule' on the end of the hose, and to release it you need to pull the light-grey plastic ring back in towards the ferrule (away from the black plastic fitting).
The hose should then just pop off as you're doing that.
Best Answer
"A trickle of hot with the cold turned off" is utterly normal for any modern fixture with a built-in anti-scald valve arrangement, which responds to low cold water pressure by blocking hot water flow.
If cold water is flowing from the faucet to the hot water circulating loop, it sounds like you need a check valve, or if you have one it's backwards, in the wrong location, or not working.