[QUOTE] Only drawback to a standard IBC tank is the HDPE material - it's only good for up to 60degC; above that it gets all silly and falls down. If you plan to heat a tank you could try to find a SS one or simply use a normal steel job (ex oil tank) with static fluid and corrosion inhibitor.[/QUOTE] Hmmm, anyone got a nice old big domestic copper tank with a couple of coils in for solar and backboiler?