Drinkable Water Flexible, light and form fitting, and can therefore be installed where rigid tanks cannot be. Flexible, light and form fitting, and can therefore be installed where rigid tanks cannot be, due to shape of boat or difficult access. Easy maintenance double envelope allows inner chamber to be easily removed from outer envelope for cleaning and examination. Consists of a welded non-porous tasteless PVC water chamber (inner bladder) inside a tough nylon envelope for complete water tightness and resistance to tears and abrasions. Flexible enough to adapt shape during heavy pitching but rigid enough not to burst under pressure. Supplied with 1 1/2" inlet fitting and 1/2" outlet valve. New Model Old Model Shape Capacity L X W X H in.* 70963 18031 Square 50 L 27.5 X 27.5 X 10 70965 18033 Rectangular 100 L 41.3 X 27.5 X 10 70955 16656 Rectangular 150 L 55 X 27.5 X 10 70956 16657 Rectangular 200 L 69 X 27.5 X 10 70957 16658 Triangular 120 L 45.3 X 41.3 X 10 *Approximate dimensions when filled