Readers: Those of you rebuilding the air control system might want to consider purchasing item # 01118, Central Pneumatic, Air Filter/Regulator Unit on Sale with Harbor Tools.Com or a store nearby for $29.00. The unit looks like its a part from the boat "African Queen" but it works. Just remember to dope all the connections. What does it do? The unit regulates air pressure from 0-160 PSI and removes moisture and oil from the compressor lines w/ a reusable filter element.In combination with my entire air control system, it works very well. Its the "heart" of the air system. Cheers