[77newell]

The stainless braided hose between the compressor and the AD-9 is needed to help cool the compressed air a bit before it reaches the dryer. The instruction with the dryer probably notes the required length, unlike noses, in this case longer is better. I replaced the Airmaster on both my 77 and 93 coaches. Except for the previously mentioned mounting holes and hose length I don’t recall any difficulties. Before the change I always had water in the first tank after the dryer, afterwards I never found water and removed the auto drain valve on that tank.