hot shower??

[phishfood]

I would check the temperature of the hot side piping while having someone else run the problem shower. If it is a bad dip tube, it should get hot, and then cool down some as the colder water starts to flow through it.

[Tech]

How old is the hwt. Its possible the dip tube is broken. I would suggest checking the burner at the bottom, if its natural gas and see if something has fallen on to the burners causing a blockage. A helix coil runs up the middle of the tank. This allows the gas from combustion to flow through the tank to the flue. Sometimes this helix coil deteriorates and falls onto the burner. Or the burner itself is just clogged due to poor combustion. If the water tank is really old its probably time to replace it. I had a natural gas water tank and the water would be luke warm if the tank wasnt used for a day. We had to run a load through the washing machine to empty the tank. Then after about an hour the water would be up to temperature.

[lemmon]

Installed 1-1-2008. I did notice a little corrosion around inlet
I'll check the temp when shower is running to see if it goes down at all
its odd that the shower seems to be the only fixture affected...though I guess it makes sense since the shower uses most water and the temp change can be instantly felt.
FYI running the cold for a minute or 2 seems to lessen the amount of cinching up the hot
Thanks everyone
Lemmon

[lemmon]

After some deliberation...Delta sent me a new valve cartridge.
Still have same problem.
Ran some tests.
With Shower running set temp to approx 100 degrees.
every minute or so temp goes down by approx 1 degree.

I do not have same problem at utility sink in basement OR the Lav sink in the same bathroom...??
I am completely stumped with this.

I even changed shower head back to original shower head to see if shower head was allowing too much water?? but even that was a stretch since the lav sink gets hot water a plenty after a shower.

Any one have any ideas. My next guess will be to change hw heater BUT I do not have a problem at any other fixture in the entire house.

Thanks
Lemmon

[LiQuId]

After all this, did you change out the dip tube? it really does sound like a dip tube issue, and its a classic complaint.

"my shower gets cold very fast" reolacing the tank would solve it, but really if the tank is in good order a new dip tube is cheap as chips.

This is not as complicated as measuring temperatures all over the place, its not a heat loss calculation... Cause and effect. hot water is more boyant than cold, so the perpose of the dip tube is to feed incoming water to the bottom of the tank while hot is being used, this does a few things.
1. cold water is supplyed closer to the heat source, allowing for thermal currents to
2. Maintain hotest water at the point of use.

the hotest water is at the TOP where its drawn off from.

if the dip tube is broken then a mixing effect takes place, tempering the water at the outlet of the hot water tank.

[LiQuId]

[/U]

Originally Posted by lemmon

Installed 1-1-2008. I did notice a little corrosion around inlet
I'll check the temp when shower is running to see if it goes down at all
its odd that the shower seems to be the only fixture affected...though I guess it makes sense since the shower uses most water and the temp change can be instantly felt.

[/B]FYI running the cold for a minute or 2 seems to lessen the amount of cinching up the hot [B]
Thanks everyone
Lemmon

This is because you are now drawing some of the availablle supply from the hot water tank since its piped with the same cold supply, less draw, less mixing, less hot water demnand.

[lemmon]

LiQuId
I did not...but I will. You are right. I will try to get that done over the weekend and post results. Thanks very much.

Lemmon

[LiQuId]

You Tube

You Tube

I skipped through this quickly, so sorry if it gets off or on a lost point somewhere.

its a vey easy job to do, only real pointer i can give is to obviouslly make sure the water is off, and drained a little, and DONT use a pipewrench on the threads, for obvious reason.