I'm planning a new kegerator at the moment and wanted to ask about gas lines. At the moment I have a 2 keg kegerator in an under counter fridge. I can fit two of the newer tall kegs side by side and fit a 3.15KG CO2 bottle behind them on the compressor shelf. I'm using standard 3/8" gas line split between the two kegs. In my new kegerator, which will be in a tall larder fridge, I want to fit four kegs in, which means the gas bottle will be outside. I know I should be able to run a gas line in through the drain hole but one of the kegs will be for fizzy water (a strong selling point for my wife) and this will be at 20-25psi where as the beer will be at 12psi. I plan on having a secondary regulator to manage the different pressures. With this setup, could I use a short length of 3/16" line to get two gas lines through the drain hole? I know that it would obviously take longer to bring the kegs back up to pressure after pouring a pint but I don't often serve many pints back to back so I don't see that as an issue. Is there a problem with using 3/16 gas line to get through the drain hole?