Thetford Porta Potti 550P MSD MarineBoat Toilet Thetford Porta Potti 550P portable toilets are durable, easy to use, and easy to clean. These toilets feature a refreshing, modern appearance that looks great anywhere! With an ergonomic carrying handle, this porta potty is easily portable, making it great for boats, RVs, camping, and more. This MSD toilet features a plumbing adapter for permanent pump out via evacuation hose. Features Marine Sanitation Device Refreshed, modern appearance Cleaner s