We’ll I have pulled the one side of the petroleum hose (I believe that’s what it was, it connect blower to waste tank?) off to clean the vacc relief valve. I have not pulled it all off to check. My filters are good. I pulled the round filter just before leaving the waste tank and it looked great. I have not checked from that filter through the first 90 and the other part of the hose.I have a lot of questions, but about 15 years ago I had a similar situation. The petroleum hose from the blower to the tank had delaminated and loaded the blower hard with the lid of the recovery tank. Do you think there's an issue from the blower to the tank?