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Expansion tank for unvented cylinder

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lookandlearn76
lookandlearn76 Member Posts: 1
in Domestic Hot Water
My wife and son heard a big bang in the other night, we couldn't figure out what it was...then saw this. The weight of the expansion tank had pulled it out of the bracket and ripped a couple of small holes in the plaster. 
I went to rehang it myself but it was extremely heavy. 

I see in other posts that the weight of the piping should be sufficient. There doesn't appear to be any damage from the fall as I can see - but I'm just wondering if what I said above means there's a problem with it internally?

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  • Larry Weingarten
    Larry Weingarten Member Posts: 3,317
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    Hi, It would be good to see a picture, but I'm wondering if the diaphragm in the tank has failed and the tank filled with water. Might be worth checking 😊
    Yours, Larry
    PC7060
  • leonz
    leonz Member Posts: 1,149
    edited April 10
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    I agree with Mr. Weingarten and the total weight of the water in the tank tore it down.

    You can check for water in the expansion tank by pressing the Shraeder valve fitting and if there is water coming out it the tank is bad and you need a new expansion tank of the same size or one size larger.

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