Clogged Sink Pipe Demonstration Published August 20, 2019 at 1365 × 2048 in PermaDrain Visits LRA Expo Demonstration on why preventative maintenance is important – LRA Expo 2019 Demonstration of a clogged Sink Pipe at the Permadrain booth located at the LRA Expo 2019. Used to demonstrate preventative maintenance in plumbing. Next →