How to Refill 3rd Tank?
Recently got a new Columbus 320RS with 3-tank propane system. In the past, with a 2-tank crossover regulator, I could disconnect the empty tank to refill without closing the valve on the active tank, thus keeping gas flow during the process (so long as the crossover switch was NOT "aimed at" the empty tank). I assume that I can still do this between the 2 tanks with auto switching, but what will prevent gas from flowing from the 3rd tank when I disconnect one of the 2 that are together? Further, if I want to remove the lone 3rd tank for refill, will I have to close off both of the tanks on the other side to prevent backflow when I disconnect the 3rd hose? (Or is there a check valve in the 3rd tank regulator that takes care of this?) I could just try and see what happens, but someone else must have dealt with this before me.... Thanks in advance.