[Fulltiming]

I have used the pull cord drain valves for years on my supply and two brake tanks. I have had to replace them once when they started leaking but that was after 5 years. I got ones with a 6 foot chain and was able to route the front valve cords into a bay and the rear valve cord into the wheel well so you can easily pull them by hand every day or two. Since I don't live in near as humid an area, I just manually drain the 120 volt air compressor drain.