kvh said:I think you'd need one ball-lock valve per regulator, and then all into a header/distributor, with a pressure gage. The gages were ~$9 each, Ball valves (for that size) are the same price, and then you need the piping to run them all together and a gage still... that's probably ~$50 total. This was just under $30.
Let me try to clarify. You'll run a valve and hose barb off each secondary and those all go to their own gas in disconnect to the kegs. You can either put a single gauge on each of the secondary regs in the bank (a total of 4) or try what I suggested. If you take a gauge and adapt it to look just like gas in post that you have on your kegs, you can plug it in to any of the 4 regulator outputs via the connectors. This is like using the gauge as a temporary test set. You'd pop it on, set your pressure, pop it off.