[Destroyer]

Originally Posted by jasoncooperpcola

Wont expanding foam collapse the tank some and not allow for hydrocarbon swelling?

Good questions. My answers would be
1) I don't think so
and
2) I don't think so.

If you just foam the bottom of the tank and maybe a quarter to a half up the sides that shouldn't collapse the tank at all. And since the top and the sides would be free of foam any expansion should be able to happen without a problem.

Remember the original question was what was the best way to mount the tank. Foaming is ideal, since the expanding foam locks the tank in place. The problem with foam has always been if you need to remove a foamed in place tank it's a real bear. But by wraping the tank in a plastic film, you solve that problem. The foam adhears to the plastic film, not the tank, so removing the tank is as easy as simply cutting the film and lifting the tank out.

Understand this is just my opinion, but really, I cannot see any downside to it. Can anyone else see any problems? I see this as one of those "so simple it's a wonder why no one thought of it before" type of problems.