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Rick, Construction Supervisor
Category: Plumbing
Satisfied Customers: 21386
Experience:  Licensed Master plumber with 40+ yrs. experience.
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I got a new water heater and since then, when a sink is

Customer Question

I got a new water heater and since then, when a sink is turned on or toilet flushed, my shower water gets very hot. I understand why this happens, but it never happened with my old water heater. Is there a setting or some adjustment that can be made??
Submitted: 1 year ago.
Category: Plumbing
Expert:  Rick replied 1 year ago.

Welcome to Just Answer, my name is ***** ***** I will do my best to help you with your issue. If my initial response doesn’t answer your question then let me know and we can continue our conversation.

How many handles does your shower valve/faucet have?

Customer: replied 1 year ago.
Customer: replied 1 year ago.
If i turn DOWN the hot water heater, then i would be using less cold water to balance out the shower. would that balance out the supply/ demand issue??
Expert:  Rick replied 1 year ago.

Then the only option is to install a single handle pressure balancing shower valve. There is no adjust that can solve this problem. Pressure balancing valves have been mandated for quite some time to alleviate this issue

Expert:  Rick replied 1 year ago.

Turning down the water temp might help somewhat but it's not a solution. Unless you turn the water temp below 120 then you'll have a lot less hot water capacity from the water heater. Even then it won't eliminate the problem

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