Overall, the only maintenance is to regularly drain the air tank to reduce the amount of water circulating through the system. We offer in-line water traps that can aide in this activity, while also significantly reducing the amount of water that gets in the system in the first place. In any case, draining the system once a month is a good rule of thumb and only takes a minute. For those of us in the northern climates, keeping your system dry is key to trouble-free running in the winter.