--- product_id: 16544448 title: "Genuine OEM Flush Ball Seal Kit | 300 and 400 Series and Sealand Toilets | RV Toilet Repair and Replacement -(385311658)" price: "R1351" currency: ZAR in_stock: true reviews_count: 13 url: https://www.desertcart.co.za/products/16544448-genuine-oem-flush-ball-seal-kit-300-and-400-series store_origin: ZA region: South Africa --- # Leak-proof seal Smooth flush action OEM precision fit Genuine OEM Flush Ball Seal Kit | 300 and 400 Series and Sealand Toilets | RV Toilet Repair and Replacement -(385311658) **Price:** R1351 **Availability:** ✅ In Stock ## Summary > 🚐 Keep your RV throne flawless with OEM precision and leak-free confidence! ## Quick Answers - **What is this?** Genuine OEM Flush Ball Seal Kit | 300 and 400 Series and Sealand Toilets | RV Toilet Repair and Replacement -(385311658) - **How much does it cost?** R1351 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.za](https://www.desertcart.co.za/products/16544448-genuine-oem-flush-ball-seal-kit-300-and-400-series) ## Best For - Customers looking for quality international products ## Why This Product - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Odor & Leak Defense:** Stops unpleasant smells and bowl leakage to keep your RV fresh - • **Warranty-Safe Replacement:** Using genuine parts protects your warranty and ensures peak performance - • **Factory-Direct OEM Quality:** Guaranteed perfect fit and durability for Dometic 300 & 400 Series toilets - • **Chemical-Resistant Materials:** Built to withstand harsh RV cleaning agents and extend seal life - • **Effortless Flush Performance:** Flush ball moves freely without stickiness for reliable operation ## Overview The Dometic Genuine OEM Flush Ball Seal Kit is a high-quality replacement part designed specifically for Dometic and Sealand 300 & 400 Series RV toilets. Engineered with durable, chemical-resistant materials, it restores a tight, odor-blocking seal and ensures smooth flush ball movement. This factory-direct component guarantees proper fit, maintains warranty coverage, and prevents leaks and odors, making it an essential upgrade for RV sanitation and comfort. ## Description The Dometic Flush Ball Seal Kit is the precise OEM replacement for 300 and 400 Series Dometic Toilets with worn or deteriorated toilet seals. Prevents water leaking from the bowl and stops odors in your RV. Manufactured from high‑quality materials, the genuine Dometic seal maintains smooth flush ball operation and tight, reliable closure for cleanliness and sanitation. Genuine Dometic OEM parts are factory direct. Dometic components ensure proper fit, safety, reliability, performance, and durability. Using non-Dometic components affect product performance and could impact warranty coverage. Review: Good fit good product - Feels soft and pliable as it should Clean the bowl Opened ball valve and cleaned around the old seal including the underside of the seal Removed the old seal by reaching underneath to dislodge it and then just pull it out Thoroughly cleaned the area where seal was including the groove Closec ball valve and cleaned the ball With ball valve still closed thoroughly lube new seal with plumbers silicon lubricant Places seal in bottom of bowl raised surface is top..flat surface is bottom Use fingers to work new seal into the groove Open ball valve and verify the seal is properly located Close ball valve Clean and lube surface ball valve Work the valve Put water in to verify seal does not leak Job done in 10 minutes OEM part fits and works like it should Old seal shows visible signs of wear/abrasion I think regular cleaning and lube will extend seal life. Also the old seal wasn't visibly broken. Upon close inspection the sealing surface showed abrasion and uneven wear. This is due to the action of the ball-valve seal surfaces and amount of circumference surface travel. Review: Works great for a Dometic 310 - This seal was a perfect fit for my dometic 310 toilet in my RV. Installation was easy - the only potential issue is that you can't really feel when it is seated correctly, so I wasn't sure if it was really in place. I applied pressure all around to ensure it was in correctly. Once done I tested by adding some water to it. Where it would be gone in a matter of minutes now it has been holding for a few days. I didn't want to have to do this again any time soon, so I feel the extra cost for a OE part was worth it. ## Features - OEM MATERIALS-Built for long‑lasting performance and chemical resistance - RESTORES PROPER SEAL-Stops odors and bowl leakage - SMOOTH OPERATION-Allows flush ball to move freely without stickiness - COMPATIBLE-Dometic and Sealand 300 & 400 series toilets ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B00BRIFDY2 | | Batteries | 1 Unknown batteries required. | | Best Sellers Rank | #4,935 in Automotive ( See Top 100 in Automotive ) #5 in RV Toilet Spare Parts | | Brand | Dometic | | Customer Reviews | 4.7 4.7 out of 5 stars (1,403) | | Date First Available | November 7, 2011 | | Item Weight | 0.8 ounces | | Item model number | 385311658 | | Manufacturer | Dometic | | Manufacturer Part Number | 385311658 | | Model | 385311658 | | OEM Part Number | 385311658 | | Product Dimensions | 7 x 5 x 0.4 inches | ## Images ![Genuine OEM Flush Ball Seal Kit | 300 and 400 Series and Sealand Toilets | RV Toilet Repair and Replacement -(385311658) - Image 1](https://m.media-amazon.com/images/I/71SvkxBYvvL.jpg) ## Questions & Answers **Q: Will this fit a Sealand 2010?** A: No, this is NOT the proper seal for the 210 or 2010. The proper seal for those models is the 385316140, **Q: Will this fit a 300 series Dometic for RV?** A: I purchased one for my 300 series toilet and it fit quite well. A little bit of massaging was needed to completely install but once situated, it worked fine **Q: Is this an OEM dometic seal or 3rd party?** A: Dometic thanks you for your question. This is a dometic seal. For further information, contact our support team at customersupportcenter@dometic.com. **Q: Does this fit the Dometic 3400 electric model?** A: Dometic thanks you for your question. Unfortunately, the 385311658 flush valve is only used on the 300 series toilets. We have verified with our RV sanitation department and there is not a 3400 model currently in production. Can you please verify your model number and contact us at customersupportcenter@dometic.com for more assistance? ## Customer Reviews ### ⭐⭐⭐⭐⭐ Good fit good product *by F***O on August 21, 2026* Feels soft and pliable as it should Clean the bowl Opened ball valve and cleaned around the old seal including the underside of the seal Removed the old seal by reaching underneath to dislodge it and then just pull it out Thoroughly cleaned the area where seal was including the groove Closec ball valve and cleaned the ball With ball valve still closed thoroughly lube new seal with plumbers silicon lubricant Places seal in bottom of bowl raised surface is top..flat surface is bottom Use fingers to work new seal into the groove Open ball valve and verify the seal is properly located Close ball valve Clean and lube surface ball valve Work the valve Put water in to verify seal does not leak Job done in 10 minutes OEM part fits and works like it should Old seal shows visible signs of wear/abrasion I think regular cleaning and lube will extend seal life. Also the old seal wasn't visibly broken. Upon close inspection the sealing surface showed abrasion and uneven wear. This is due to the action of the ball-valve seal surfaces and amount of circumference surface travel. ### ⭐⭐⭐⭐⭐ Works great for a Dometic 310 *by C***S on March 14, 2025* This seal was a perfect fit for my dometic 310 toilet in my RV. Installation was easy - the only potential issue is that you can't really feel when it is seated correctly, so I wasn't sure if it was really in place. I applied pressure all around to ensure it was in correctly. Once done I tested by adding some water to it. Where it would be gone in a matter of minutes now it has been holding for a few days. I didn't want to have to do this again any time soon, so I feel the extra cost for a OE part was worth it. ### ⭐⭐⭐⭐⭐ The unsung hero of RV plumbing *by J***S on July 10, 2025* It’s a toilet seal. Glamorous? No. Necessary? Absolutely. This little rubber ring is the MVP of keeping the stink where it belongs. Easy to install—just pop out the old one, slap in the new one, and boom: you're back to flushing like a champ. Pro tip: wear gloves. This isn’t the time to test your immune system or your stomach. Also, keep a spare on hand. Trust me, you don’t want to discover a toilet seal emergency mid-camping trip. Nothing ruins a peaceful morning in nature like a malfunctioning throne. Five stars for function, zero stars for job glamour. Still, highly recommend. ## Frequently Bought Together - Dometic 385311658 Flush Ball Seal Kit 310 Toilets - Dometic 385311641 Genuine OEM Water Valve Kit | 300 301 310 320 Dometic and Sealand Toilets | Includes Hose Clamp and Fasteners | White Compact Kit for Efficient Repair and Replacement - Dometic 385311652 Mounting Hardware Kit, White --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.co.za/products/16544448-genuine-oem-flush-ball-seal-kit-300-and-400-series](https://www.desertcart.co.za/products/16544448-genuine-oem-flush-ball-seal-kit-300-and-400-series) --- *Product available on Desertcart South Africa* *Store origin: ZA* *Last updated: 2026-09-19*