{"product_id":"large-24v-shower-sump-pump-system-mk2","title":"Large 24V Shower Sump Pump System Mk2","description":"\u003c!-- \n  ***********************************************************\n  EBAY LISTING DATA\n  ***********************************************************\n  OPTIMIZED EBAY TITLE (80 Chars): Attwood Large MK2 Shower Sump Pump System 24V 800 GPH Marine Boat 5144-1\n  SEO NOTES: Research confirms Attwood MK2 series. SKU 5144-1 (24V Large). Features X-Air Impeller. Fits multiple drain inlets.\n--\u003e\n\n\u003cdiv style=\"font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif; font-size: 16px; line-height: 1.6; color: #333333; max-width: 900px; margin: 0 auto;\"\u003e\n\n  \u003cscript type=\"application\/ld+json\"\u003e\n  {\n    \"@context\": \"https:\/\/schema.org\/\",\n    \"@type\": \"Product\",\n    \"name\": \"Large 24V Shower Sump Pump System MK2\",\n    \"description\": \"High-capacity Attwood MK2 shower sump system with 800 GPH flow rate and 24V DC operation. Features X-Air impeller technology to prevent air-locks and a gasketed lid to prevent overflows.\",\n    \"brand\": { \"@type\": \"Brand\", \"name\": \"Attwood\" },\n    \"sku\": \"5144-1\",\n    \"mpn\": \"5144-4\",\n    \"offers\": {\n      \"@type\": \"Offer\",\n      \"url\": \"https:\/\/4boats.co.uk\/products\/large-24v-shower-sump-pump-system-mk2\",\n      \"priceCurrency\": \"GBP\",\n      \"price\": \"{{ product.price | money_without_currency }}\",\n      \"availability\": \"https:\/\/schema.org\/InStock\"\n    }\n  }\n  \u003c\/script\u003e\n\n  \u003cdiv style=\"background-color: #2c3e50; color: #ffffff; padding: 40px 20px; text-align: center; border-radius: 6px 6px 0 0;\"\u003e\n    \u003ch1 style=\"margin: 0; font-size: 28px; letter-spacing: 1px; text-transform: uppercase; color: #ffffff;\"\u003eLarge 24V Shower Sump Pump System MK2\u003c\/h1\u003e\n    \u003cp style=\"margin: 10px 0 0; font-size: 18px; color: #ecf0f1;\"\u003ePremium 800 GPH High-Capacity Marine Drainage\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv style=\"padding: 25px; border: 1px solid #e0e0e0; border-top: none; background-color: #ffffff;\"\u003e\n    \u003cp style=\"margin-top: 0;\"\u003eThe Attwood MK2 Shower Sump Pump System is engineered to handle the high-volume drainage requirements of modern marine freshwater systems. This \"Large Box\" version provides extra capacity to prevent overflows from multiple sources like showers, galley sinks, and dishwashers simultaneously.\u003c\/p\u003e\n    \u003cdiv style=\"background-color: #f8f9fa; border-left: 5px solid #27ae60; padding: 15px; margin: 20px 0;\"\u003e\n      \u003cstrong style=\"color: #27ae60;\"\u003eINNOVATION:\u003c\/strong\u003e Featuring the patented \u003cstrong\u003eX-Air™ Impeller\u003c\/strong\u003e, this system forces air bubbles out of the pump and pipework, effectively eliminating air-locks that cause traditional pumps to run dry and fail.\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv style=\"display: flex; flex-wrap: wrap; margin-top: 20px; gap: 20px;\"\u003e\n    \u003cdiv style=\"flex: 1; min-width: 300px; border: 1px solid #e0e0e0; border-radius: 6px; padding: 20px; background-color: #ffffff;\"\u003e\n      \u003ch3 style=\"color: #2c3e50; border-bottom: 2px solid #3498db; padding-bottom: 10px; margin-top: 0;\"\u003eKey Features\u003c\/h3\u003e\n      \u003cul style=\"list-style-type: none; padding: 0; margin: 0;\"\u003e\n        \u003cli style=\"padding: 10px 0; border-bottom: 1px dashed #eee;\"\u003e✔ \u003cstrong\u003eAnti-Airlock:\u003c\/strong\u003e X-Air impeller prevents vapor lock\u003c\/li\u003e\n        \u003cli style=\"padding: 10px 0; border-bottom: 1px dashed #eee;\"\u003e✔ \u003cstrong\u003eGasketed Lid:\u003c\/strong\u003e Seals the box against overflow and odors\u003c\/li\u003e\n        \u003cli style=\"padding: 10px 0; border-bottom: 1px dashed #eee;\"\u003e✔ \u003cstrong\u003eTool-less Service:\u003c\/strong\u003e Snap-in pump and switch design\u003c\/li\u003e\n        \u003cli style=\"padding: 10px 0; border-bottom: 1px dashed #eee;\"\u003e✔ \u003cstrong\u003eIntegral Vent:\u003c\/strong\u003e Prevents air pressure build-up\u003c\/li\u003e\n        \u003cli style=\"padding: 10px 0; border-bottom: 1px dashed #eee;\"\u003e✔ \u003cstrong\u003eMulti-Port:\u003c\/strong\u003e Connects to several drains at once\u003c\/li\u003e\n      \u003c\/ul\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv style=\"flex: 1; min-width: 300px; border: 1px solid #e0e0e0; border-radius: 6px; padding: 20px; background-color: #ffffff;\"\u003e\n      \u003ch3 style=\"color: #2c3e50; border-bottom: 2px solid #3498db; padding-bottom: 10px; margin-top: 0;\"\u003eTechnical Specs\u003c\/h3\u003e\n      \u003ctable style=\"width: 100%; border-collapse: collapse;\"\u003e\n        \u003ctr\u003e\n\u003ctd style=\"padding: 8px 0; border-bottom: 1px solid #eee;\"\u003e\u003cstrong\u003eVoltage:\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 0; border-bottom: 1px solid #eee; text-align: right;\"\u003e24V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd style=\"padding: 8px 0; border-bottom: 1px solid #eee;\"\u003e\u003cstrong\u003eFlow Rate:\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 0; border-bottom: 1px solid #eee; text-align: right;\"\u003e800 GPH (3028 LPH)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd style=\"padding: 8px 0; border-bottom: 1px solid #eee;\"\u003e\u003cstrong\u003eFuse Size:\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 0; border-bottom: 1px solid #eee; text-align: right;\"\u003e2.0 Amp\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd style=\"padding: 8px 0; border-bottom: 1px solid #eee;\"\u003e\u003cstrong\u003eOutlet Dia:\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 0; border-bottom: 1px solid #eee; text-align: right;\"\u003e3\/4\" (19mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd style=\"padding: 8px 0; border-bottom: 1px solid #eee;\"\u003e\u003cstrong\u003eBox Length:\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 0; border-bottom: 1px solid #eee; text-align: right;\"\u003e343 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd style=\"padding: 8px 0; border-bottom: 1px solid #eee;\"\u003e\u003cstrong\u003eBox Width:\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 0; border-bottom: 1px solid #eee; text-align: right;\"\u003e187 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003c\/table\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv style=\"margin-top: 30px;\"\u003e\n    \u003ch3 style=\"background-color: #34495e; color: #fff; padding: 12px 15px; margin: 0; border-radius: 6px 6px 0 0; text-align: center;\"\u003eCompatibility \/ Fitment Guide\u003c\/h3\u003e\n    \u003cdiv style=\"overflow-x: auto;\"\u003e\n      \u003ctable style=\"width: 100%; border-collapse: collapse; border: 1px solid #ddd;\"\u003e\n        \u003cthead\u003e\n          \u003ctr style=\"background-color: #ecf0f1;\"\u003e\n            \u003cth style=\"padding: 12px; border: 1px solid #ddd; text-align: left;\"\u003ePort Type\u003c\/th\u003e\n            \u003cth style=\"padding: 12px; border: 1px solid #ddd; text-align: left;\"\u003eSupported Hose ID\u003c\/th\u003e\n            \u003cth style=\"padding: 12px; border: 1px solid #ddd; text-align: left;\"\u003eTypical Usage\u003c\/th\u003e\n          \u003c\/tr\u003e\n        \u003c\/thead\u003e\n        \u003ctbody\u003e\n          \u003ctr\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #ddd;\"\u003eInlet Port 1\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #ddd;\"\u003e3\/4\" (19mm)\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #ddd;\"\u003eSink Drain\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #ddd;\"\u003eInlet Port 2\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #ddd;\"\u003e1\" (25mm) or 1-1\/8\" (28mm)\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #ddd;\"\u003eShower Stall\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #ddd;\"\u003eInlet Port 3\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #ddd;\"\u003e1-1\/2\" (38mm)\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #ddd;\"\u003eHigh-Flow Drain\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #ddd;\"\u003eDischarge\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #ddd;\"\u003e3\/4\" (19mm)\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #ddd;\"\u003eOverboard Discharge\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003c\/tbody\u003e\n      \u003c\/table\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv style=\"margin-top: 30px;\"\u003e\n    \u003ch3 style=\"background-color: #34495e; color: #fff; padding: 12px 15px; margin: 0; border-radius: 6px 6px 0 0; text-align: center;\"\u003eOEM Cross Reference\u003c\/h3\u003e\n    \u003ctable style=\"width: 100%; border-collapse: collapse; border: 1px solid #ddd;\"\u003e\n        \u003ctr\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #ddd; background-color: #f9f9f9; font-weight: bold;\"\u003eAttwood MPN\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #ddd;\"\u003e5144-1, 5144-4\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #ddd; background-color: #f9f9f9; font-weight: bold;\"\u003eUPC\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #ddd;\"\u003e022697028976\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #ddd; background-color: #f9f9f9; font-weight: bold;\"\u003eSeries\u003c\/td\u003e\n\u003ctd style=\"padding: 12px; border: 1px solid #ddd;\"\u003eMK2 (X-Air Impeller Series)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003c\/table\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv style=\"margin-top: 30px; background-color: #fcfcfc; border: 1px solid #e0e0e0; border-radius: 6px; padding: 20px;\"\u003e\n    \u003ch3 style=\"color: #2c3e50; border-bottom: 2px solid #3498db; padding-bottom: 10px; margin-top: 0;\"\u003eQuestions \u0026amp; Answers\u003c\/h3\u003e\n    \u003cdiv style=\"margin-bottom: 15px;\"\u003e\n      \u003cp style=\"margin: 0 0 5px 0; font-weight: bold; color: #333;\"\u003eIs this a genuine original part?\u003c\/p\u003e\n      \u003cp style=\"margin: 0; color: #666; font-size: 15px;\"\u003eYes, this is a genuine Attwood MK2 series product, recognized for superior reliability and ignition protection in marine environments.\u003c\/p\u003e\n    \u003c\/div\u003e\n    \u003cdiv style=\"margin-bottom: 15px;\"\u003e\n      \u003cp style=\"margin: 0 0 5px 0; font-weight: bold; color: #333;\"\u003eWhat is the benefit of the \"Large\" box vs the \"Standard\" box?\u003c\/p\u003e\n      \u003cp style=\"margin: 0; color: #666; font-size: 15px;\"\u003eThe Large box has a higher internal volume, which reduces the frequency of pump cycling and provides a buffer for high-flow fixtures like modern rainfall showers.\u003c\/p\u003e\n    \u003c\/div\u003e\n    \u003cdiv style=\"margin-bottom: 0;\"\u003e\n      \u003cp style=\"margin: 0 0 5px 0; font-weight: bold; color: #333;\"\u003eCan I use this with a 12V system?\u003c\/p\u003e\n      \u003cp style=\"margin: 0; color: #666; font-size: 15px;\"\u003eNo, this specific model is designed for 24V DC power systems only. Running this on 12V will result in significantly reduced flow and potential motor damage.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv style=\"margin-top: 30px; text-align: center; font-size: 14px; color: #7f8c8d; border-top: 1px solid #eee; padding-top: 20px;\"\u003e\n    \u003cp\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e Please verify your vessel's voltage and original footprint before purchasing. Standard and Large boxes have different mounting dimensions.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e","brand":"MARATHON","offers":[{"title":"Default Title","offer_id":57464682283391,"sku":"5144-1","price":164.95,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0568\/8216\/7897\/files\/5144-1.jpg?v=1777969065","url":"https:\/\/4boats.co.uk\/products\/large-24v-shower-sump-pump-system-mk2","provider":"4Boats","version":"1.0","type":"link"}