{"product_id":"dometic-510-plus-511h-spring-cartridge-385236096","title":"Dometic 510 Plus \u0026 511H Spring Cartridge 385236096","description":"\u003cp class=\"nvn-hero\"\u003eThe genuine Dometic 510 Plus and 511H spring cartridge assembly, part number 385236096, is the return spring that keeps your toilet's flush ball sealing. When the bowl stops holding water and tank odor creeps in, a tired spring is usually the cause. Drop in this OEM part and get the seal back without swapping the whole head.\u003c\/p\u003e\n\n\u003cdiv class=\"nvn-description\"\u003e\n\u003cp\u003eIf your Dometic 510 Plus or 511H toilet has stopped holding water in the bowl, the spring cartridge is one of the first parts worth checking. This is the genuine Dometic spring cartridge assembly, part number 385236096, and it's the return spring that keeps the flush mechanism sealing the way it did the day the head was new. It's a small part. But it does a big job every single time you use the head.\u003c\/p\u003e\n\u003cp\u003eHere's how these gravity-flush heads work. When you step off the flush pedal, a spring pulls the flush ball back into the closed position so the bowl reseals and holds a little water. That standing water is what forms the odor seal between your bathroom and the holding tank below. Over the seasons the original spring loses tension, or salt and hard water gum it up, and the ball stops snapping fully closed. The result is the classic complaint we hear all the time. The bowl won't hold water, and pretty soon you start smelling the tank. Sometimes the pedal feels loose or lazy on the return, too. That's the spring telling you it's tired.\u003c\/p\u003e\n\u003cp\u003eThis assembly is the genuine Dometic replacement for that spring mechanism, so you get the correct tension and fitment for the 510 Plus and 511H series. There's no guessing on aftermarket spring rates or shimming a part that almost fits. It drops into the same spot the factory spring came out of, and it works with the flush ball hardware that's already in your head.\u003c\/p\u003e\n\u003cp\u003eThe job itself is a manageable one for most boat and RV owners. You'll be working down at the base of the toilet where the flush ball and shaft live, so it helps to shut off the water supply and flush the bowl dry first. The spring cartridge comes out and the new one goes in as a single assembly, which keeps the fiddly little internal parts together and takes a lot of the guesswork out of the rebuild. Give yourself good light, a clear work area, and a little patience, and it's an afternoon fix rather than a haul-out or a service call.\u003c\/p\u003e\n\u003cp\u003eA quick word on scope, because it saves people a second teardown. If the only symptom is a weak return and a slow reseal, this spring cartridge on its own usually brings the head right back to life. But if the flush ball itself is scored, or the seal around it has worn flat, you'll want to service the ball and shaft at the same time. When we rebuild one of these on the bench, we always look at the whole flush ball assembly while it's apart. It's cheap insurance, and it beats being back down there on your knees a month later.\u003c\/p\u003e\n\u003cp\u003eBecause it's a genuine Dometic part, it carries the fit and finish you'd expect from the original equipment, and it keeps your repair inside the manufacturer's own parts line. That matters if the head is still under any coverage, and it matters for resale when it's time to sell the boat or the rig. We stock the real thing, not a look-alike that leaves you wondering why the pedal still feels off.\u003c\/p\u003e\n\u003cp\u003eSo who's this for? Anyone running a Dometic 510 Plus or 511H series toilet who wants to fix a bowl that won't hold water without spending real money on a whole new unit. It's the smart first move. Order the spring cartridge, check the ball and seal while you're in there, and you'll get plenty more seasons out of a head that's already installed and plumbed. And if you're not sure whether the spring or the ball is your real problem, give us a shout and we'll help you sort out the diagnosis before you order.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul class=\"nvn-features\"\u003e\n  \u003cli\u003eGenuine Dometic spring cartridge assembly, part number 385236096, with the correct factory-matched spring tension\u003c\/li\u003e\n  \u003cli\u003eFits Dometic 510 Plus and 511H series gravity-flush toilets\u003c\/li\u003e\n  \u003cli\u003eRestores the flush ball's return and reseal so the bowl holds water again\u003c\/li\u003e\n  \u003cli\u003eComes as a complete assembly, keeping the small internal parts together for an easier rebuild\u003c\/li\u003e\n  \u003cli\u003eGenuine Dometic replacement part, not an aftermarket look-alike\u003c\/li\u003e\n  \u003cli\u003eDirect drop-in for the original spring mechanism, no modification needed\u003c\/li\u003e\n  \u003cli\u003eA targeted repair that saves you from replacing the whole toilet\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cdiv class=\"nvn-trust\"\u003e\n  \u003ch2\u003eWhy Buy from NVN Marine\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eAuthorized Dometic reseller, full manufacturer warranty\u003c\/li\u003e\n    \u003cli\u003eNMEA member and ABYC certified, advice from real boat techs\u003c\/li\u003e\n    \u003cli\u003eSame-day shipping before 3 PM ET on in-stock items\u003c\/li\u003e\n    \u003cli\u003eNY headquarters and Fort Lauderdale flagship retail store\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cdiv class=\"nvn-faq\"\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat does this spring cartridge actually do?\u003c\/summary\u003e\n    \u003cp\u003eIt's the return spring for the toilet's flush ball. When you release the flush pedal, the spring pulls the ball back to the closed, sealed position so the bowl holds water. That standing water is what keeps tank odor out of the bathroom.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhich toilets does part 385236096 fit?\u003c\/summary\u003e\n    \u003cp\u003eIt's the replacement spring cartridge for the Dometic 510 Plus and 511H series toilets.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eMy Dometic toilet won't hold water in the bowl. Will this fix it?\u003c\/summary\u003e\n    \u003cp\u003eVery often, yes. A bowl that drains between uses is the classic sign of a tired spring that can no longer snap the flush ball fully closed. If the ball or its seal is also worn, you'll want to service those at the same time.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eIs this a genuine Dometic part?\u003c\/summary\u003e\n    \u003cp\u003eYes. This is the genuine Dometic spring cartridge assembly, part number 385236096, so you get the correct spring tension and a proper fit in the 510 Plus and 511H series.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eCan I install it myself?\u003c\/summary\u003e\n    \u003cp\u003eMost boat and RV owners can. You work at the base of the toilet around the flush ball and shaft. Shut off the water and flush the bowl dry first, then swap the cartridge in as a single assembly. With good light and a little patience it's an afternoon job.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eDo I need to replace anything else at the same time?\u003c\/summary\u003e\n    \u003cp\u003eNot always. If the only issue is a weak spring return, the cartridge alone usually does it. But if the flush ball is scored or the seal is worn flat, service the ball and shaft while you're in there so you don't have to take the head apart twice.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat's the part number and UPC?\u003c\/summary\u003e\n    \u003cp\u003eThe Dometic manufacturer part number is 385236096 and the UPC is 087735103565.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhy did my original spring fail?\u003c\/summary\u003e\n    \u003cp\u003eSprings wear out. Over time the original loses tension, and salt or hard water can corrode and gum it up so the flush ball stops closing fully. Replacing the cartridge restores the correct return force.\u003c\/p\u003e\n  \u003c\/details\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ctable class=\"nvn-specs\"\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003cth\u003eTitle\u003c\/th\u003e\n\u003ctd\u003eReplacement For Dometic 510 Plus And 511H Series Toilet\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003ctd\u003eDometic\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eManufacturer\u003c\/th\u003e\n\u003ctd\u003eDometic Sanitation Systems\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eManufacturer Part Number\u003c\/th\u003e\n\u003ctd\u003e385236096\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eUPC\u003c\/th\u003e\n\u003ctd\u003e087735103565\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003ePart Type\u003c\/th\u003e\n\u003ctd\u003eSpring Cartridge Assembly\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eFits\u003c\/th\u003e\n\u003ctd\u003eDometic 510 Plus Series Toilet\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eAlso Fits\u003c\/th\u003e\n\u003ctd\u003eDometic 511H Series Toilet\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eComponent\u003c\/th\u003e\n\u003ctd\u003eFlush ball return mechanism\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eProduct Type\u003c\/th\u003e\n\u003ctd\u003eMarine and RV Toilet Repair Part\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003ePart Genuineness\u003c\/th\u003e\n\u003ctd\u003eGenuine Dometic OEM Replacement\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eSold As\u003c\/th\u003e\n\u003ctd\u003eSingle assembly\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n    \"@context\": \"https:\/\/schema.org\",\n    \"@type\": \"FAQPage\",\n    \"mainEntity\": [\n        {\n            \"@type\": \"Question\",\n            \"name\": \"What does this spring cartridge actually do?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"It's the return spring for the toilet's flush ball. When you release the flush pedal, the spring pulls the ball back to the closed, sealed position so the bowl holds water. That standing water is what keeps tank odor out of the bathroom.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Which toilets does part 385236096 fit?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"It's the replacement spring cartridge for the Dometic 510 Plus and 511H series toilets.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"My Dometic toilet won't hold water in the bowl. Will this fix it?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Very often, yes. A bowl that drains between uses is the classic sign of a tired spring that can no longer snap the flush ball fully closed. If the ball or its seal is also worn, you'll want to service those at the same time.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Is this a genuine Dometic part?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Yes. This is the genuine Dometic spring cartridge assembly, part number 385236096, so you get the correct spring tension and a proper fit in the 510 Plus and 511H series.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Can I install it myself?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Most boat and RV owners can. You work at the base of the toilet around the flush ball and shaft. Shut off the water and flush the bowl dry first, then swap the cartridge in as a single assembly. With good light and a little patience it's an afternoon job.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Do I need to replace anything else at the same time?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Not always. If the only issue is a weak spring return, the cartridge alone usually does it. But if the flush ball is scored or the seal is worn flat, service the ball and shaft while you're in there so you don't have to take the head apart twice.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"What's the part number and UPC?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"The Dometic manufacturer part number is 385236096 and the UPC is 087735103565.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Why did my original spring fail?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Springs wear out. Over time the original loses tension, and salt or hard water can corrode and gum it up so the flush ball stops closing fully. Replacing the cartridge restores the correct return force.\"\n            }\n        }\n    ]\n}\n\u003c\/script\u003e\n","brand":"Dometic","offers":[{"title":"Default Title","offer_id":45073235804253,"sku":"2009231","price":47.69,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0299\/7266\/0317\/files\/ImageServerAPI_8e5003c5-00b6-46e3-8f20-042de0ce91bc.png?v=1789764257","url":"https:\/\/nvnmarine.com\/products\/dometic-510-plus-511h-spring-cartridge-385236096","provider":"NVN Marine","version":"1.0","type":"link"}