Moeller Holding Tank, polyethylene, 24 gallon, for water or waste. This tank is in compliance with FDA regulations which ensures safe, odor-free water. It meets US Coast Guard standards. Nominal wall thickness of 0.2". Measurements: 29.5" long by 16.63" wide by 12.75" high. Two 1.5" NPT openings and one 0.5" NPT vent.