The hot water temp in the master shower/bath is too cold. The rest of the house seems fine. This is a one year old house and we have a dual hot water heater system.

I looked over the plumbing at the water heaters, and am not familiar with how it is plumbed. The hot water piping coming out of one heater is hot and the other is cold/cool. The two tanks are plumbed together with a tee. I assume that this second tank may be plumbed into the master shower/tub and if so can I adjust the temp by simply turning up the water heater set point on the cooler water heater?

Any input/ideas would be appreciated.

Bob in Montana
406-261-3741

The hot water piping coming out of one heater is hot and the other is cold/cool. More details please. Gas or electric? Temp settings on both? Are these tanks hooked up allel in series or parallel? ( Series are when the hot water from heater two connects into the cold water inlet on number two. Parallel is when cold connects to cold and hot connects to hot) The heater that gets the cold water first is heater #1 is that the one that gives hot water? Back to you, Tom

Thanks Tom.

They are electric. I believe they are in series - I think the hot water from one tank does feed the cold side of the other. I do know that the hot water piping on one tank is hot and the other is not. Can this be as simple as just adjusting the set point on one of the heaters? The master bath does have a large shower with multiple shower heads. Would one heater be dedicated just to this one room?

I am not at home now, but I can get back to you this afternoon with the exact details of how it is plumbed.

I appreciate the help.

Bob

So I can keep things straight let's call the heater that has hot water "heater #1 and the other #2. Look at the temperature setting on 1 and 2 and let me know what they read, Also check the elements on #2 to be sure they're getting power. And if you have power to the elements you might have burned out elements. I'll wait for your reply. Tom

So I can keep things straight let's call the heater that has hot water "heater #1 and the other #2. Look at the temperature setting on 1 and 2 and let me know power. And if you have power to the elements you might have burned out elements. I'll wait for your reply. Tom

Tank #2 isn't even wired in? The cold water feeds into the unwired tank, feeds to the hot tank, through the "hot" line. There is a tee above the hot side of the unwired tank with a ball valve on it. The temp on the working tank is at about 140.

Am I missing something or should they both be wired in?

I think I get what you are saying, but can you post some pics to clarify? I would say both tanks should be wired, otherwise the tank that isn't wired is doing you no good. If you get both tanks up and running, you should be able to set the temps at 120-125. No more for fear of scalding.

I agree with Lee. Reset the temp back to 120 on both and wire in tank #2. Get back to us with the results. Want to post a picture? Here you go!

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Good luck, Tom

I think I get what you are saying, but can you post some pics to clarify? I would say both tanks should be wired, otherwise the tank that isnt wired is doing you no good. If you get both tanks up and running, you should be able to set the temps at 120-125. No more for fear of scalding.How can I post a picture for you gentlemen to look at?

asphaltbob, check out post #7

How can I post a picture for you gentlemen to look at?

Here is a couple of pictures of the system. As you can see the far tank is not wired in.

Notice the ball valve going into the wall from the unwired tank?

Please let me know what you guys think.

Thanks.

Bob