{"product_id":"non-return-19-25-mm-check-valve-3-4-1-in-4boats","title":"Lalizas 31345 Non-Return Valve Inline Check Valve 19mm 3\/4\" 25mm 1\" Marine Boat","description":"\u003c!-- \n  ***********************************************************\n  EBAY LISTING DATA\n  ***********************************************************\n  OPTIMIZED EBAY TITLE (80 Chars): Lalizas 31345 Non-Return Valve Inline Check Valve 19mm 3\/4\" 25mm 1\" Marine Boat\n  SEO NOTES: Grounded in SKU 31345 research. Dual-size fitment verified for 19mm and 25mm hoses. Ideal for bilge pump backflow prevention.\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\": \"Lalizas Non-Return Valve with 3\/4\\\" or 1\\\" Outlet\",\n    \"description\": \"Marine-grade inline non-return (check) valve designed to prevent backflow in bilge pump and plumbing systems. Features stepped barbs for 19mm (3\/4\\\") and 25mm (1\\\") hose connections.\",\n    \"brand\": { \"@type\": \"Brand\", \"name\": \"Lalizas\" },\n    \"sku\": \"31345\",\n    \"mpn\": \"31345\",\n    \"offers\": {\n      \"@type\": \"Offer\",\n      \"url\": \"https:\/\/4boats.co.uk\/products\/non-return-valve-with-3-4-or-1-outlet\",\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;\"\u003eLalizas Non-Return Valve (31345)\u003c\/h1\u003e\n    \u003cp style=\"margin: 10px 0 0; font-size: 18px; color: #ecf0f1;\"\u003eDual Size: 3\/4\" (19mm) or 1\" (25mm) Outlet\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;\"\u003eThis Lalizas premium inline non-return valve is a critical component for any marine plumbing system. Designed to permit water flow in only one direction, it prevents the annoying and potentially dangerous \"back-siphoning\" of water from discharge lines back into the bilge. This is particularly effective for aiding pump priming in suction lines and ensuring your bilge remains as dry as possible after the pump shuts off.\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;\"\u003eRELIABILITY:\u003c\/strong\u003e Engineered with corrosion-resistant marine-grade materials and a quick-release clip for effortless maintenance and debris removal.\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\u003eDual-Sized Barbs:\u003c\/strong\u003e Fits 19mm and 25mm hoses.\u003c\/li\u003e\n        \u003cli style=\"padding: 10px 0; border-bottom: 1px dashed #eee;\"\u003e✔ \u003cstrong\u003eQuick-Service Design:\u003c\/strong\u003e Tool-free maintenance clip.\u003c\/li\u003e\n        \u003cli style=\"padding: 10px 0; border-bottom: 1px dashed #eee;\"\u003e✔ \u003cstrong\u003eUniversal Fit:\u003c\/strong\u003e Compatible with manual and electric pumps.\u003c\/li\u003e\n        \u003cli style=\"padding: 10px 0; border-bottom: 1px dashed #eee;\"\u003e✔ \u003cstrong\u003eFlow Direction:\u003c\/strong\u003e Clearly marked for error-free install.\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\u003eManufacturer:\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd style=\"padding: 8px 0; border-bottom: 1px solid #eee; text-align: right;\"\u003eLalizas\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd style=\"padding: 8px 0; border-bottom: 1px solid #eee;\"\u003e\u003cstrong\u003ePart Number:\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd style=\"padding: 8px 0; border-bottom: 1px solid #eee; text-align: right;\"\u003e31345\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd style=\"padding: 8px 0; border-bottom: 1px solid #eee;\"\u003e\u003cstrong\u003eInlet\/Outlet:\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd style=\"padding: 8px 0; border-bottom: 1px solid #eee; text-align: right;\"\u003e19mm (3\/4\") or 25mm (1\")\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd style=\"padding: 8px 0; border-bottom: 1px solid #eee;\"\u003e\u003cstrong\u003eMaterial:\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd style=\"padding: 8px 0; border-bottom: 1px solid #eee; text-align: right;\"\u003eHigh-Impact Composite\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd style=\"padding: 8px 0; border-bottom: 1px solid #eee;\"\u003e\u003cstrong\u003eType:\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd style=\"padding: 8px 0; border-bottom: 1px solid #eee; text-align: right;\"\u003eIn-line Check Valve\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;\"\u003eApplication\u003c\/th\u003e\n            \u003cth style=\"padding: 12px; border: 1px solid #ddd; text-align: left;\"\u003eHose Diameter\u003c\/th\u003e\n            \u003cth style=\"padding: 12px; border: 1px solid #ddd; text-align: left;\"\u003eNotes\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;\"\u003eElectric Bilge Pumps\u003c\/td\u003e\n            \u003ctd style=\"padding: 12px; border: 1px solid #ddd;\"\u003e19mm (3\/4\")\u003c\/td\u003e\n            \u003ctd style=\"padding: 12px; border: 1px solid #ddd;\"\u003eStandard for 500-800 GPH pumps\u003c\/td\u003e\n          \u003c\/tr\u003e\n          \u003ctr\u003e\n            \u003ctd style=\"padding: 12px; border: 1px solid #ddd;\"\u003eManual Bilge Pumps\u003c\/td\u003e\n            \u003ctd style=\"padding: 12px; border: 1px solid #ddd;\"\u003e25mm (1\")\u003c\/td\u003e\n            \u003ctd style=\"padding: 12px; border: 1px solid #ddd;\"\u003eFits common hand pump discharge hoses\u003c\/td\u003e\n          \u003c\/tr\u003e\n          \u003ctr\u003e\n            \u003ctd style=\"padding: 12px; border: 1px solid #ddd;\"\u003eFreshwater Systems\u003c\/td\u003e\n            \u003ctd style=\"padding: 12px; border: 1px solid #ddd;\"\u003eVarious\u003c\/td\u003e\n            \u003ctd style=\"padding: 12px; border: 1px solid #ddd;\"\u003eSuitable for low-pressure gravity\/pump systems\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 style=\"background-color: #fcfcfc;\"\u003e\n        \u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eLalizas MPN:\u003c\/strong\u003e\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003e31345\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eGauci Borda Ref:\u003c\/strong\u003e\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003e34529\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr style=\"background-color: #fcfcfc;\"\u003e\n        \u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eSEAFLO Equivalent:\u003c\/strong\u003e\u003c\/td\u003e\n        \u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003eSFCV-1925-01\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 Lalizas marine component, designed for high-performance durability in saltwater 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;\"\u003eHow do I know if it is compatible?\u003c\/p\u003e\n      \u003cp style=\"margin: 0; color: #666; font-size: 15px;\"\u003eThis valve is universal for any system using 19mm (3\/4\") or 25mm (1\") ID flexible hoses. Simply match your hose size to the stepped barbs provided.\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;\"\u003eDoes it restrict flow significantly?\u003c\/p\u003e\n      \u003cp style=\"margin: 0; color: #666; font-size: 15px;\"\u003eWhile all check valves introduce a slight resistance, this model features a high-flow internal flapper design to minimize head loss while ensuring a tight seal against backflow.\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 hose inner diameter before purchasing. For 25mm (1\") applications, the smaller 19mm tip can be left as-is or trimmed if maximum flow is required.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e","brand":"4Boats","offers":[{"title":"Default Title","offer_id":56755700466038,"sku":"31345","price":22.0,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0621\/8140\/9004\/files\/itm_31345.jpg?v=1770817907","url":"https:\/\/www.leighnumberplates.com\/products\/non-return-19-25-mm-check-valve-3-4-1-in-4boats","provider":"Leigh Number Plates","version":"1.0","type":"link"}