Ride height adjusters can leak air pretty bad They have o-rings in them. I have had a leaker. I have been lucky and my audible air leaks have been before I leave and have had time to repair. I would add an assortment of air line fittings, sealant for pipe threads, and a length of DOT air line. Any time I replace a fitting I just buy two of the type I replace. They are pretty cheap. I suddenly had a serious leak at my dash air gauge. It was just a swivel fitting that let go quickly.