Vacuum relief valve or not

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bradah

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I’m wondering if in my situation I need a vacuum relief valve on my Bradford White Arrowtherm hybrid water heater. I have city water and there is a backflow check valve so that water from the house can’t go back into the main system. Wouldn’t the backflow check valve negate the need of a vacuum check valve?
 

Reach4

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No relationship.

Vacuum relief valves are usually for when the WH is not on the lowest floor. I am not a pro.

The city backflow check valve would be the reason that thermal expansion tanks are needed on tank-type water heaters. You need an expansion tank for your Bradford White AeroTherm hybrid water heater.
 

Jadnashua

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My city requires one, regardless of where the WH is located to pass an inspection. WH are designed for pressure, not vacuum, and a vacuum can damage one.
 

bradah

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My water heater is in the basement... I plan to install the TET.

Thank you for the replies.
 
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