Vacuum relief valve on hot water storage tank

[John Gayewski]

yes on a slab its not really needed however your code requires it as does the tank manufacture instructions ( I belive most manufactures have it in the instructions)

If they are fed from the domestic water on the bottom or if they are in an attic. Otherwise they aren't needed.

 

[Jeff H Young]

" OR BOTTOM FED " yes so there ya go requires vac relief valve . I havent checked if our code requires it on a bottom feeder I havent installed one in many years

 

[Sponsor]

 

[John Gayewski]

" OR BOTTOM FED " yes so there ya go requires vac relief valve . I havent checked if our code requires it on a bottom feeder I havent installed one in many years

It's fed from the top on the domestic side. The combi is not the feed, that loop could be glycol or anything else.

Nevermind this is not an indirect tank.