Mayfair Replacement Automatic Bilge Pump by Johnson PumpStay ahead of bilge buildup with this automatic Johnson blige pump, available in 500, 750, or 1000 GPH models. Smart sensors activate the pump when water levels rise, and a manual test button lets you check functionality on the spot. The twist-lock cartridge design makes cleaning or replacement quick and tool-free. Ready to handle saltwater and tough marine conditions, it installs easily and runs quietly to maintain onboard stability. With a 3-year warranty and self-regulating performance, it's a reliable choice for keeping your bilge dry and your boat safe.Direct replacement for older models of Mayfair Automatic Bilge Pumps with an Ultima Switch.Features: Pre-configured with an electric Ultima Switch for automatic operation; Extremely energy-efficient; Water-cooled motor for long service intervals; Compact, all-in-one motor/impeller unit with stainless steel shaft; Easy-to-install Dura-Port discharge ports; Includes both straight and 90 smooth elbow Dura-Port; Meets international standard, ISO 8849 marine; Specifications: Dimensions: 4.41" Height x 4.25" Width x 3.35" Depth; Part No.DescriptionCapacity 3ft. HeadCapacity StraightVoltageAmperageFuse SizeConnectionWire Size07503-00Ultima Combo 500 GPH33 l/min - 525 GPH40 l/min - 630 GPH12 V2.5 A5 A3/4"16 GA07703-00Ultima Combo 750 GPH44 l/min - 700 GPH50 l/min - 800 GPH12 V3 A5 A3/4"16 GA07903-00Ultima Combo 1000 GPH50 l/min - 800 GPH63 l/min - 1000 GPH12 V3.2 A5 A3/4"16 GA Click to Download Johnson Pump Automatic Bilge Pump User Manual