Moeller Marine Products 12 Gallon Water/Waste Holding Tank 41215 12 Gallon Water/Waste Holding Tank Dimensions: 24 1/4 in. Length x 15 1/4 in. Width x 8 3/4 in. Height Nominal wall thickness of .30 in. Resin Meets FDA spec CFT177 1520 requirements Satisfies all US Coast Guard standards Includes (2) 1 1/2 in. NPT fill/drain ports and (1) 5/8 in. NPT vent port Polyethylene tank will not filter taste into water or emit waste odors