Happy to help. I guess I should point out where you find 3 inch flex pipe to hook to the PVC so you can vacuum stuff up... Its at walmart in the automotive section directly under the MotorHome toilet paper...

http://www.walmart.com/ip/Camco-10-Heavy-Duty-Sewer-Hose/14504316
http://www.walmart.com/ip/Camco-10-Heavy-Duty-Sewer-Hose/14504316