Hot Water Hotter at Bath Faucet

RobLC

The water coming out of the hot water faucet in the bathtub is hotter than the water coming out of the hot water faucet in the basin.

If you go into the basement, it appears (appears, but might not be so) both faucets are being fed by the same hot water pipe from the hot water heater.

Has anyone ever come across this?

Thank you.

TonyS

Are they single handle faucets

 I have seen some cartridges leak through

Mark Eatherton

Got DHW recirculation return?

Have seen the check valve fail and allow cooler water to run backwards through the system and mix at the point of use...



ME

RobLC

Thanks, to Tony S and Mark Eatherton...

Thanks for taking the time to answer my question.

I'll see what I can find.  I'm not sure I'll be able to find the check valve.

Thanks again for the replies.



RobLC

kevinnj

hot water

are the faucets single lever, Some single lever cartridges fit basin faucets and shower valves and have limit stops for scald protection. if so it needs adjusting.

Rich Kontny_3

Volume

  There is a good chance that the lav faucet has a flow resticter in the aerator. The bathtub faucet does not require a flow restricter. You are getting lots more water through the tub faucet.



Rich Kontny

RobLC

Thank you, Kevinnj and Rich Konyny...

The faucet is the classic Delta - - one valve for cold and one valve for hot.

Yes, the basin faucet does have an aerator.

I will look into these things.

Thank you for taking the time to answer my question.

RobLC

RobLC

Apologies, Rich Kontny...

Must be a little tired.

Thanks, again.

Larry Weingarten

Try turning...

... the cold supply off at the sink.  See if the hot water gets hotter.  If so, you know there is some cross connection in the sink valve.  Another test for cross connection is to shut off the cold supply to the heater and open a hot tap.  If it doesn't stop running pretty soon, it is either because cold is entering the system somewhere or the shutoff valve doesn't really shut off.



Yours,  Larry

RobLC

Thank you, Larry...

Yes, Ok, will give a try.

Thank you for your help on this one.

RobLC