Portable Toilet New & Improved Styling Replaces Porta Potti 365 MSD Refreshed, modern appearance Cleaner seat and cover design More ergonomic carrying handle Lid latch now standard Redesigned valve handle, fill cap & pump Porta Potti is still the original and best! Durable, easy to use and easy to clean. Exclusive, rotating pour-out spout Deodorant sample included Piston pump flush Removable seat and cover for easy cleaning Sealed valve keeps odors in holding tank Easy-to-read Level Indicator tells when it's time to empty Optional Hold down kit secures toilet to deck Optional MSD (not interchangeable with pour-out spout) 1-year warrantyThetford Porta Potti 550P has New & Improved StylingReplaces Porta Potti 365Refreshed, modern appearanceCleaner seat and cover designMore ergonomic carrying handleLid latch now standardRedesigned valve handle, fill cap & pumpThetford Porta Potti 550P is still the original and best!Durable, easy to use and easy to clean.Exclusive, rotating pour-out spoutDeodorant sample includedPiston pump flushRemovable seat and cover for easy cleaningSealed valve keeps odors in holding tankEasy-to-read Level Indicator tells when it's time to empty1-year warrantyDIMENSIONS of the Thetford Porta Potti 550PHigh ProfileCapacitiesA 16-1/2" : 41.9 cmFresh Water: 4.0 gal: 15LB 16-1/2" : 41.9 cmWaste Tank: 5.5 gal: 21LC 15" : 38.1 cmAverage Flushes: 56