This is a step by step guide to building an air system for anywhere from 10 tanks to 500 tanks or more, the only difference will be the supply pump. This system that I have runs 20 tanks with ease & there is plenty of air to spare for more tanks. First of all you will need a few things: Air supply pump, I'm using a Resun LP40 Heavy duty 13mm irrigation hose, I used 10m for this job 13mm T pieces 13mm L or corner pieces 4mm silicone airline, I used about 15m 4mm threaded