[Chevyrod]

This is my first time ever doing an air ride system. I have been doing some research and asking alot of questions over the past couple of months and just decided to jump in head first. I have a fill valve and a dump valve for each bag. This enables me to control each bag independently FBSS. The fill valve is first then the dump. When you hit the switch it opens the fill valve which lets the air out of the tank to the bag. When you hit the down switch it opens the dump valve and lets the air out of the bag. I was told by many people it is best to have a set of valves for each bag. I don't now why but that is what was suggested to me. Now that I have started mine, I think if you just wanted to go up and down you get away with just a fill and dump valve for the front and then another set of valves for the rear.
I hope I answered your question.