I have 10 of the IBC tanks made by Shutz. Before purchasing your fittings make sure that you verify that they will fit your tank. I don't know about the others but the earlier poster was correct, Schutz tanks do have different fittings. I get mine from Dayton Industrial Drum (Global Industrial does not carry fittings for the Schutz tanks). My contact is Dave K and his number is (937) 253-8933.

I use mine as collection tanks for our gravity tubes, transport tanks in my dump trailer and a transfer tank on the 3-pt hitch of the tractor. I've only used them a single season but have not yet had any leaks from the valves.