BAIT SENTRY 500 Magnetic Drive Livewell Pump - 500 GPH. The sportsfishing livewell application requires an extremely rugged pump to withstand the harsh marine environment. SHURFLO's BAIT SENTRY is designed for easy installation and trouble-free operation. Magnetic drive technology eliminates unnecessary failures. Anti-airlock feature allows pump to clear trapped air in rough water or when boat is anchored. Dual ports allow for easy washdown pump connections.. Features:. Magnetically Driven Impeller, Debris will not Damage Motor. No Seals to Leak, Can Run Dry Continuously. Anti-Airlock Feature will Clear Trapped Air Even in Rough Water. Second Inlet Port for Washdown Pump, Requires One Thru-Hull FItting for Two Pumps. UL & CE Listed