Whirlpool 40 Gallon Water Heater

[jake1963]

Brand New. Hot water runs to bath tub, Bathroom sink and kitchen sink.

When turn on water in bath tub it is warm no matter how long I run it. If I leave it running and turn on hot water in bathroom sink faucet the water running in tub gets hot immediately. Then if I turn off the sink faucet the water running in tub goes back to warm. The water in sink won't get hot no matter what I do (gets warm)  and can get no hot water in kitchen.

Some of the plumbing was run improperly but I have fixed it but that made no difference.

Weirdest thing I have ever seen! Please Help.....

Thanks

 

[Keinokuorma]

Umm, could be reflux through an improperly working mixer valve on a tap... on hot side pressure is usually lower so cold water will tend to flow backwards into hot tubes if there is a mixer valve that has a broken reflux preventer on the hot side.

[jake1963]

I thought that, but replaced the entire bathtub/shower faucet - still same problem

[Keinokuorma]

If I got it right, you run the pipes first for shower/tub, then bathroom sink, then kitchen... Right?

Might first want to check the bathroom sink tap... opening that would easen the pressure in the cold pipe, so the cold will not mix into the hot in the plumbing... so you have hot water to the tub... tha last link of the chain, the kitchen, has weakest pressure, and if the middle tap allows a lot of reflux, you get primarily cold water there...

[jake1963]

I will try that and let you know. Thanks

[applianceman18007260692]

I had the same problem when I installed my last water heater. turns out my boy did not open up the water meter valve but half way.  several of my female members of the family complained about getting they butts burned while taking a shower when somebody opened the tap in the kitchen, after the fun wore off ,I went out there and checked the dang water meter and the boy had opened it halfasst. true redneck story.