{"product_id":"jabsco-43990-0066-o-ring-marine-toilet-pump-seal","title":"Jabsco 43990-0066 O-Ring — Marine Toilet \u0026 Pump Replacement Seal","description":"\u003ch2\u003eJabsco 43990-0066 O-Ring\u003c\/h2\u003e\u003cp\u003eA precision-fit replacement O-ring for Jabsco marine toilet and pump systems. This small but critical seal maintains watertight integrity at key connection points within the pump assembly — preventing leaks, odours, and pressure loss that can compromise toilet performance over time.\u003c\/p\u003e\u003ch3\u003eParts Desk Insights\u003c\/h3\u003e\u003cp\u003eThis O-ring is the correct replacement when you're experiencing minor leaks at pump fittings or during a scheduled service interval on a Jabsco manual or electric marine toilet. It is most commonly replaced as part of a full service kit procedure — if you're already pulling the pump apart, replacing this seal at the same time is strongly recommended to avoid a repeat teardown. Always verify the part number \u003cstrong\u003e43990-0066\u003c\/strong\u003e against your model's parts diagram before ordering, as Jabsco uses several O-ring sizes across their toilet range.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eOEM Jabsco replacement O-ring — part number 43990-0066\u003c\/li\u003e\n\u003cli\u003eMaintains watertight seal at pump assembly connection points\u003c\/li\u003e\n\u003cli\u003ePrevents leaks and odour ingress caused by seal wear\u003c\/li\u003e\n\u003cli\u003eCompatible with Jabsco marine toilet and pump systems\u003c\/li\u003e\n\u003cli\u003eCompact and lightweight — ideal to keep as a spare aboard\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eRelated Service Parts\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/jabsco-major-service-kit-manual-marine-toilet-29045-2000\"\u003eJabsco Major Service Kit – Manual Marine Toilet (29045-2000)\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/jabsco-twist-n-lock-complete-pump-assembly-manual-marine-toilet-29040-3000\"\u003eJabsco Twist 'N' Lock Complete Pump Assembly – Manual Marine Toilet (29040-3000)\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/jabsco-par-12v-electric-toilet-conversion-kit-37010-0092\"\u003eJabsco Par 12V Electric Toilet Conversion Kit (37010-0092)\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/jabsco-6303-0003-p-nitrile-impeller-gasket-kit\"\u003eJabsco 6303-0003-P Nitrile Impeller \u0026amp; Gasket Kit\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"LNS","offers":[{"title":"Default Title","offer_id":51199423545380,"sku":"6-439900066","price":11.89,"currency_code":"CAD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0743\/5799\/7604\/files\/images_f881b771-97ac-4797-86fc-bf8fa1c2cb6d.jpg?v=1785785164","url":"https:\/\/marisolmarine.com\/products\/jabsco-43990-0066-o-ring-marine-toilet-pump-seal","provider":"Marisol Marine Company","version":"1.0","type":"link"}