{"product_id":"whale-bp4772-gulper-grouper-mk3-fishbox-waste-discharge-pump-12v","title":"Whale BP4772 Gulper Grouper MK3 Fishbox \u0026 Waste Discharge Pump | 4.2 GPM 12V","description":"\u003ch2\u003eWhale BP4772 Gulper Grouper MK3 — Fishbox \u0026amp; Waste Discharge Pump\u003c\/h2\u003e\u003cp\u003eThe \u003cstrong\u003eWhale Gulper Grouper MK3\u003c\/strong\u003e is a purpose-built 12V discharge pump designed for boats that need a reliable, clog-free solution for evacuating fishbox waste, bait tank water, or toilet holding tank discharge. With a 4.2 GPM flow rate and a 90° port orientation, it drops directly into tight spaces where standard macerator pumps won't fit — no adapters, no awkward hose routing.\u003c\/p\u003e\u003cp\u003eUnlike traditional macerator pumps, the Gulper Grouper uses \u003cstrong\u003enon-choke valve technology\u003c\/strong\u003e — meaning no impeller to jam, no filters to clean, and no motor burnout from debris. It handles the messy jobs on board without complaint.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e90° port orientation\u003c\/strong\u003e — direct drop-in replacement for most macerator pump installations in compact bilge or under-deck spaces\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNon-choke Gulper valve technology\u003c\/strong\u003e — no impeller, no filters, no clogged pump heads\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e360° rotating head\u003c\/strong\u003e — align hose connections in any direction for a clean, stress-free installation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e4.2 GPM flow rate at 12V\u003c\/strong\u003e — moves waste efficiently without oversizing your electrical draw\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEasy to clean and maintain\u003c\/strong\u003e — tool-free access for routine service\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual-purpose capable\u003c\/strong\u003e — equally effective for fishbox\/bait tank evacuation and toilet waste discharge\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eBest Use Cases\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eFishbox and bait tank drainage on sport fishing and charter boats\u003c\/li\u003e\n\u003cli\u003eToilet waste discharge in compact heads compartments\u003c\/li\u003e\n\u003cli\u003eReplacing failed or clog-prone macerator pumps without re-routing hoses\u003c\/li\u003e\n\u003cli\u003eAny 12V DC marine application requiring a self-priming, debris-tolerant discharge pump\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eParts Desk Insights\u003c\/h3\u003e\u003cp\u003eThe MK3 is the current production revision of the Gulper Grouper line. The 90° port is the key differentiator from the standard Gulper Grouper — it's the right call when hose clearance is tight or the pump must mount flush against a bulkhead. If your application needs higher flow or a 24V system, see the \u003ca href=\"\/products\/11110185205796\"\u003eWhale Marine Gulper Grouper 12V Evacuation Pump 6.5 GPM\u003c\/a\u003e. For shower sump or galley waste applications, the \u003ca href=\"\/products\/11064496488484\"\u003eWhale BP2052 Gulper 320 12V\u003c\/a\u003e or \u003ca href=\"\/products\/11064496521252\"\u003eWhale BP2054 Gulper 320 24V\u003c\/a\u003e are better matched to those flow rates and duty cycles. SKU: 698-BP4772.\u003c\/p\u003e","brand":"LNS","offers":[{"title":"Default Title","offer_id":51199432949796,"sku":"698-BP4772","price":426.29,"currency_code":"CAD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0743\/5799\/7604\/files\/698-BP4772.jpg?v=1785605271","url":"https:\/\/marisolmarine.com\/products\/whale-bp4772-gulper-grouper-mk3-fishbox-waste-discharge-pump-12v","provider":"Marisol Marine Company","version":"1.0","type":"link"}