So I order the geo for my own place (very exciting day for a HVAC guy) and they sent me absolutely not what I asked for! Long story short I was not going to use desuperheaters in my own house. Was just going to use an on demand gas heater. I now am the proud owner or should I say I’m stuck with two systems both with desuperheaters. Now since I don’t have a storage tank this is a perfect opportunity to use my own house as a test subject. I’m planning on putting in 2 tanks as buffers for my on demand unit but I didn’t know it there were any poly tanks out there that would be suitable for the application. Don’t really want to put I. A steel tank that would eventually rust. Would a poly tank stand up to the entering water temps or should I just let the whole thing go? Anybody messed with anything like this before or have any ideas? Thanks!