{"product_id":"johnson-pump-first-mate-bilge-pump-400-gph-jp-21405-12v-3-4-inch-discharge","title":"Johnson Pump First Mate Bilge Pump 400 GPH, JP-21405, 12V 3\/4 Inch Discharge","description":"\u003cp\u003eThe Johnson Pump First Mate Bilge Pump JP-21405 is a 400 GPH, 12-volt submersible bilge pump built specifically for pontoon livewell and personal watercraft (PWC) bilge applications, where mounting space is tight and easy maintenance matters. The pump's electric motor can be locked into three different positions, giving installers flexibility to route wiring more directly and work around cramped compartments. It is also extremely tolerant of low battery voltage situations, drawing more amperage from its DC motor as needed to keep pumping rather than stalling out when voltage sags.\u003c\/p\u003e\u003cp\u003eAn easy-to-plumb 90 degree Dura Port simplifies hose routing through tight spaces, and an integrated side mounting bracket makes installation straightforward without extra hardware. The JP-21405 serves as a direct replacement for older model Mayfair First Mate bilge pumps, so it can be swapped into existing setups built around that earlier design. With a 3\/4 inch discharge connection, a 2.5 amp draw, and a recommended 5 amp fuse, this pump is sized for smaller livewell and bilge compartments rather than high-volume bilge duty.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Johnson Pump\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e JP-21405\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Bilge Pump\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStyle:\u003c\/strong\u003e Manual\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlow Rate:\u003c\/strong\u003e 400 GPH\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVoltage:\u003c\/strong\u003e 12 V\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAmperage Draw:\u003c\/strong\u003e 2.5 A\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRecommended Fuse Size:\u003c\/strong\u003e 5 A\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnection \/ Hose Size:\u003c\/strong\u003e 3\/4 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMax Height (Shut-Off Head):\u003c\/strong\u003e 4 inches (100 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Plastic\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.7 pounds\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003ePontoon livewell applications\u003c\/li\u003e\n\u003cli\u003ePWC (personal watercraft) bilge applications\u003c\/li\u003e\n\u003cli\u003eDirect replacement for older model Mayfair First Mate bilge pumps\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat is the Johnson Pump JP-21405 designed for?\u003c\/strong\u003e The Johnson Pump First Mate Bilge Pump JP-21405 is built specifically for pontoon livewell and PWC (personal watercraft) bilge applications where mounting space is limited.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the flow rate of this bilge pump?\u003c\/strong\u003e The JP-21405 has a flow rate of 400 GPH at 12 volts, with a 2.5 amp draw and a recommended 5 amp fuse.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat size hose connection does it use?\u003c\/strong\u003e This pump has a 3\/4 inch discharge connection and uses a 90 degree Dura Port to simplify hose routing in tight spaces.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill this pump work if my battery voltage is low?\u003c\/strong\u003e Yes, the JP-21405 is extremely tolerant of low battery voltage situations. Its DC motor increases amperage draw as needed to keep operating rather than stalling.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan this pump replace my old Mayfair bilge pump?\u003c\/strong\u003e Yes, the Johnson Pump JP-21405 is a direct replacement for older model Mayfair First Mate bilge pumps.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow is the JP-21405 mounted?\u003c\/strong\u003e This bilge pump includes an integrated side mounting bracket, and its electric motor can be locked into three different positions to allow more direct wiring routing.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the maximum lift height for this pump?\u003c\/strong\u003e The JP-21405 has a maximum height (shut-off head) rating of 4 inches (100 mm).\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat material is the pump housing made of?\u003c\/strong\u003e The Johnson Pump First Mate Bilge Pump JP-21405 is constructed of plastic.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat fuse size should I use with this pump?\u003c\/strong\u003e A 5 amp fuse is recommended for the JP-21405, which draws 2.5 amps during operation.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the JP-21405 weigh?\u003c\/strong\u003e The Johnson Pump First Mate Bilge Pump JP-21405 weighs 0.7 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this pump suitable for high-volume bilge duty?\u003c\/strong\u003e No, the JP-21405 is sized for smaller livewell and PWC bilge compartments rather than high-volume bilge pumping; larger capacity Johnson Pump models are available for heavier duty needs.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat voltage does this bilge pump run on?\u003c\/strong\u003e The Johnson Pump JP-21405 operates on a 12 volt DC system.\u003c\/p\u003e","brand":"Johnson Pump","offers":[{"title":"Default Title","offer_id":49028227629275,"sku":"MAY-21405","price":34.37,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/Old-First-Mate-Design__04771.1722496759.500.750.jpg?v=1785164655","url":"https:\/\/www.goodvibesmarina.com\/products\/johnson-pump-first-mate-bilge-pump-400-gph-jp-21405-12v-3-4-inch-discharge","provider":"Good Vibes Marina","version":"1.0","type":"link"}