{"product_id":"tecreddy-rv-toilet-flush-ball-seal-replacement-for-dometic-300-310-320-2-pack-durable-rubber-gaskets","title":"Tecreddy RV Toilet Flush Ball Seal Replacement for Dometic 300\/310\/320 - 2-Pack Durable Rubber Gaskets","description":"\u003cp\u003e\u003cstrong\u003eTecreddy’s two-pack RV toilet flush ball seals replace Dometic part 385311658 for 300, 310 and 320 series toilets, restoring a reliable, watertight flush seal.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eIf your RV toilet is leaking, not holding water, or feels loose around the flush ball, a worn gasket is often the culprit. These replacement seals are molded from a durable rubber compound to match the original dimensions for a snug fit and extended service life. They’re sold as a value two-pack so you have a spare on hand for future maintenance.\u003c\/p\u003e\n\n\u003ch3\u003eHow will this seal fix a leaking or weak flush?\u003c\/h3\u003e\n\u003cp\u003eThe flush ball seal creates the watertight barrier between the bowl and the flush valve. When the original rubber hardens, cracks, or becomes misshapen, water escapes and the toilet won’t hold a proper water level. Replacing the gasket restores the intended seal and improves the toilet’s performance without replacing the entire unit.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eDirect fit for Dometic 300, 310, 320, 400, 410, 420 series toilets\u003c\/li\u003e\n  \u003cli\u003eMatches OEM dimensions for a consistent seal\u003c\/li\u003e\n  \u003cli\u003eStops common leaks caused by hardened or torn gaskets\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eIs it difficult to install the new flush ball seals?\u003c\/h3\u003e\n\u003cp\u003eInstallation is designed to be quick and tool-free in most cases. You generally pop the old seal out and press the new one into place with the marked side facing up, no disassembly of the toilet required. A properly seated gasket should sit flush with the valve opening to ensure full sealing.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eTypical install time: a few minutes per seal\u003c\/li\u003e\n  \u003cli\u003eNo special tools needed for standard Dometic toilets\u003c\/li\u003e\n  \u003cli\u003eMarked side indicates correct orientation during installation\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat size are these gaskets and which models do they fit?\u003c\/h3\u003e\n\u003cp\u003eEach gasket measures approximately 4 inches outer diameter and 2.75 inches inner diameter, matching the original OEM sizing for compatible Dometic models. These seals replace part number 385311658 and are not compatible with models such as the 210 or 510 series or other unlisted toilets.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eOuter diameter: 4 inches; inner diameter: 2.75 inches\u003c\/li\u003e\n  \u003cli\u003eReplaces Dometic part number 385311658\u003c\/li\u003e\n  \u003cli\u003eCompatible: Dometic 300, 310, 320, 400, 410, 420 (not for 210, 510)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhy choose a two-pack rather than a single seal?\u003c\/h3\u003e\n\u003cp\u003eBuying a pair gives you immediate replacement for one failing seal and a spare for future wear, saving both time and money. Rubber seals degrade over years of use and exposure to chemicals, so having a backup reduces downtime and the need for repeat orders.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCost-effective compared with individual seal purchases or service calls\u003c\/li\u003e\n  \u003cli\u003eKeeps a spare on hand for seasonal maintenance\u003c\/li\u003e\n  \u003cli\u003eFactory-molded from the original pattern for consistent fit\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho this is for: RV owners and fleet managers with Dometic 300\/310\/320 (and select 400-series) toilets who need a reliable, low-cost repair option. Ideal for DIY maintenance, rental operators, and anyone looking to stop leaks and restore flush performance without replacing the whole toilet. If you’re unsure about fit, check your toilet’s model number and part reference before ordering, and contact Tecreddy customer service for assistance.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Will this seal fit my Dometic toilet model?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: These gaskets replace part 385311658 and fit Dometic 300, 310, 320, 400, 410, 420 series. They do not fit 210, 510 or unlisted models.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Do I need tools to install the flush ball seal?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: No special tools are typically required; the old seal pops out and the new one presses into place with the marked side up.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Tecreddy","offers":[{"title":"Default Title","offer_id":67592803778745,"sku":"B0B36YW56Q","price":58.77,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0822\/3765\/3177\/files\/tecreddy-front-packaging-rv-seal.jpg?v=1790568292","url":"https:\/\/redleafauto.ca\/products\/tecreddy-rv-toilet-flush-ball-seal-replacement-for-dometic-300-310-320-2-pack-durable-rubber-gaskets","provider":"Redleaf Auto","version":"1.0","type":"link"}