here's the lazey mans version - used 4" PVC with cap on rear and screw on cap for the business end . On the 30" Sundance, the PVC pipe will fit just in front and on top of the black sewer outlet. the sheet metal screw holding up the under body membrane is located exactly right for an alumuim tape (plumper's tape) holder bracket. Another similar piece will secure the curbside and can be attached to an existing bracket holding the factorty sewer drain . Easy mod !