Thetford (40510 Smart Portable Waste Tote Tank with 4 Wheels - 18 Gallon Capacity A premium portable waste tank that delivers the utmost in ease of use, convenience, sanitation and ease of storage Thetford's innovative design brings it all together with patented hose handling and AutoStop fill shutoff to prevent spills Saves time, effort, hassle; Completely self-contained; nothing else to buy Self-storing sewer hose stays connected at bottom of tank 18 Gallon