Vacuum relief valve or not

[bradah]

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]

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.

 

[Sponsor]

 

[WorthFlorida]

.........

 

[Jadnashua]

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]

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

Thank you for the replies.