Perfect for wakeboard and ski tow boats, this reversible pump allows you to add or dump up to 88lb. of water ballast per minute. Modern electronics guard against dry running damage to the impeller. Self-priming. Neoprene impeller. gpm: 8 Reverse Cycle: Yes Self-Prime: 20' Material: Bronze Port Sizes: 1/2" NPT and 1" external hose barb Dimensions: 3-5/8"H x 4-3/4"W x 7-1/8"L Draw: 15A at 12V DC Warranty: One year