"With their high level of flexibility, these pumps are ideally suited for use in boats as bilge and deckwash pumps, fresh water pumps, refuelling pumps for oil and diesel. These pumps may be combined with a vacuum switch for automatic operation. Heavy duty to provide long service life even under heavy use. dimensions: 7"L x 4.72"W x 3.54"H NOT TO BE USED IN POTABLE WATER SYSTEMS."