I built this sewage pipe storage container.  The storage compartment in the BTC was too small.  So I went to a landscaping place where they sell stones and pipes for irrigation.  I bought a 6" diameter by 3' in length PVC pipe with pre-drilled holes for drainage or irrigation.  I also purchased a solid screw cap (and drilled ventilation holes in the bottom of the cap).  Also, I purchased a collar & screw in cap for the top.  All I have to do is unscrew and insert the longer hose.  The connectors also fit into the tube.  I installed it at an angle to the ladder over the rear bumper with pipe clamps and 2 pieces of painted wood with half moon cut outs to fit the hose holder.  The angle was purposely done for drainage.