. I have 2 now, one for backup in case of an emergency breakdown of the other. Since I'm using canisters (please don't start) I imagine I'd have to find a way to attach shutoff values of some variety. I have long considered hard plumbing into the tank and transistioning to flex pipe underneath. I guess I could valve at the transistion. The hard plumbing would give the support the heater needs.
Here's an idea, how bout they make the heater w/ a shutoff already on it. Hmmmmmm