Porta Potti 550P MSDPart #: 92856Features: Refreshed, modern appearance Cleaner seat and cover design More-ergonomic carrying handle Lid latch now standard Redesigned valve handle, fill cap and pump Same industry-leading performance Fresh and waste-water tank sizes MSD version (not interchangeable with pour-out spout) Deodorant sample included Fresh Water Tank: 4.0 gallons Waste Water Tank: 5.5 gallons Average Flushes: 56 This product may not be returned to the original point of purchase. Please contact the manufacturer directly with any issues or concerns. Owner&';s Manual (pdf)