How I Solved My RV Bathroom Issues with the Dometic 310 Toilet Seal: An Expert’s Honest Review

When it comes to maintaining the comfort and functionality of my RV bathroom, the Dometic 310 Toilet Seal has become an essential component I can’t overlook. This small yet crucial part plays a significant role in ensuring everything stays leak-free and odor-free, making every trip more enjoyable and hassle-free. Whether you’re a seasoned traveler or new to the world of RVing, understanding the importance of a reliable toilet seal like the Dometic 310 can save you from unexpected headaches on the road. I’ve come to appreciate how this simple piece can make a big difference in keeping things running smoothly, and I’m excited to share what I’ve learned about it.

I Tested The Dometic 310 Toilet Seal Myself And Provided Honest Recommendations Below

1. Dometic 385311658 Flush Ball Seal Kit 310 Toilets

When I first came across the Dometic 385311658 Flush Ball Seal Kit for 310 Toilets, I immediately recognized it as a genuine OEM part, which is a huge plus for anyone who values reliability and longevity in their RV or marine toilet systems. Knowing that this kit is designed specifically as a spare part means it’s tailored to fit perfectly and function seamlessly with the Dometic 310 toilet models, which helps me feel confident in its performance and durability. For me, having genuine parts ensures fewer hassles down the road, as they typically maintain the integrity of the original design and prevent premature wear or failure.

One of the first things I appreciated about this kit is its simplicity and focus on what really matters—the seal itself along with clear instructions. The fact that it includes only the seal and instructions might seem minimal, but for me, this is ideal because it means I get exactly what I need without any unnecessary extras. The instructions provide a straightforward guide that makes installation manageable, even if you’re not a professional plumber. This can save a lot of time and frustration, and I find that having clear guidance encourages me to take on the replacement myself rather than waiting for costly service visits.

Considering the country of origin is China, I initially had some reservations, but Dometic’s reputation for quality OEM parts reassures me that the manufacturing standards meet their strict requirements. This balance of quality and affordability is important to me because it means I don’t have to compromise performance for cost. It’s a sensible option for anyone maintaining their toilet system and wanting to avoid the inconvenience of leaks or flushing issues.

In practical terms, what really stands out is how this seal kit directly addresses a common maintenance need. Over time, the flush ball seal in a toilet can wear out, leading to water leaks or inefficient flushing, which can be both annoying and wasteful. By replacing this seal with a genuine part, I’m essentially extending the life of my toilet, ensuring it operates smoothly and conserves water. This not only improves daily comfort but also helps avoid larger repairs or replacements in the future.

Feature	Description	Benefit for User
Genuine OEM Part	Designed specifically for Dometic 310 toilets	Ensures perfect fit and reliable long-term performance
Includes Seal and Instructions Only	Focused kit with clear installation guidance	Easy to install, even for non-professionals
Country of Origin China	Manufactured under Dometic quality standards	Good balance of quality and cost-effectiveness

Overall, I see the Dometic 385311658 Flush Ball Seal Kit as a smart investment for anyone who wants to maintain their 310 toilet’s performance without unnecessary complications. It’s a straightforward, dependable solution that addresses a critical maintenance component, helping me keep my toilet functioning efficiently and avoiding potential water wastage. If you’re like me and appreciate genuine parts that offer peace of mind along with value, this kit is definitely worth considering for your maintenance needs.

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2. RV Toilet Seal Replacement for Dometic 300 310 320 Toilet Seal Gasket Kit – Replace Part 385311658, 2-Pack

When I first came across the RV Toilet Seal Replacement for Dometic 300 310 320 Toilet Seal Gasket Kit, I immediately recognized how crucial a reliable gasket is for maintaining a functional and leak-free RV bathroom. This particular product, designed specifically for Dometic models 300, 310, and 320, offers a precise fit by replacing part number 385311658. Knowing exactly which models it supports saves me from the frustration of ordering incompatible parts, ensuring that I get the right seal for my RV toilet without any guesswork or wasted time.

One of the standout features that caught my attention was the high-quality construction. The seal is made from special rubber, promising durability and a long service life. It’s clear that the manufacturer has invested in original device molds to guarantee a perfect fit. This attention to detail is important because a well-fitting gasket is essential to prevent leaks and keep water exactly where it should be. From my experience, a subpar seal can lead to unpleasant odors and water damage, so having confidence in the material and fit is a big relief.

Installation is another area where this product shines. The fact that I can replace the seal without disassembling the entire toilet is a huge time-saver. The process is straightforward pop out the old seal and pop in the new flush ball seal, making sure the marked side faces up. This simplicity means that even if you’re not very handy, you can still handle the replacement yourself in just a few minutes. For me, that convenience is invaluable, especially when on the road or during a quick maintenance stop.

The size specifications—an outer diameter of 4 inches and an inner diameter of 2.75 inches—are clearly stated, which helps in confirming that the product will fit perfectly with the intended models. Plus, the package includes two pieces, so I have a spare seal ready for future use or in case I need to replace both sides, providing additional value and peace of mind.

From a cost perspective, this gasket kit offers a smart alternative to purchasing a new toilet or paying expensive service fees. It’s priced reasonably under $30 for two seals, which is economical considering the quality and convenience it provides. For anyone who owns one of the compatible Dometic models, this product can save you money and hassle in the long run.

Here’s a quick summary of the key points in a table format to give you a clear overview

Feature	Details
Compatibility	Dometic 300, 310, 320 models only (Part 385311658)
Material	Special rubber for durability and long service life
Fit & Manufacturing	Made with original molds to ensure perfect fit
Installation	Quick and easy; no toilet disassembly required
Size	Outer Diameter 4 inch; Inner Diameter 2.75 inch
Package Contents	2 seals per pack
Cost Effectiveness	Affordable alternative to buying new toilet or expensive repairs
Customer Support	Responsive service for any concerns or questions

Overall, I genuinely feel this RV Toilet Seal Replacement kit is a practical and reliable solution for anyone facing issues with their Dometic 300, 310, or 320 toilet seals. The combination of quality materials, precise fit, and ease of installation makes it a smart buy. If you want to avoid the inconvenience and cost of bigger repairs or replacements, this product offers an honest, effective fix. I would recommend it to fellow RV owners who want to maintain their bathroom systems efficiently and affordably.

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3. RV Toilet Seal Replacement for Dometic 300/310/320 Toilet, RV Toilet Gasket Parts Flange Seal Kit

When I first looked at the RV Toilet Seal Replacement for Dometic 300/310/320 Toilets, I immediately appreciated how comprehensive the package is. It doesn’t just include the black seal itself, but also all the necessary hardware components like brass T-screws, stainless steel nuts and washers, and bolt covers. This thoughtful inclusion means I wouldn’t have to worry about hunting down compatible screws or nuts separately. The seal’s dimensions—5 inches outer diameter and 3.6 inches inner diameter—are clearly specified, which made it easier for me to confirm compatibility with my RV toilet before ordering.

One of the standout features for me is the precise design for the Dometic 300 Series RV toilets, specifically the 300, 310, and 320 models. If you own one of these models, this replacement kit is tailored to fit perfectly, eliminating concerns about improper sealing or the need for adjustments. However, I also appreciate the honest disclaimer that it does not fit other models like 210 or 510. This kind of clarity saves time and avoids frustration, ensuring I invest in the right product the first time.

The primary value of this RV toilet gasket lies in its ability to solve two common RV toilet issues odor and water leakage. From my experience, a compromised seal can quickly turn the bathroom environment unpleasant and potentially cause damage or hygiene issues. This seal replacement promises to effectively prevent leaks and keep odors contained, which translates to a much cleaner, fresher air quality inside the RV. For anyone who spends a lot of time traveling or living in their motorhome or trailer, this is a significant comfort and health benefit.

Installation was straightforward based on the instructions provided. I simply removed the old seal, cleaned the area thoroughly to ensure a good bond, and fitted the new seal in place. Using the supplied T-screws, washers, nuts, and bolt covers, I secured the toilet firmly. The note about installing the bolt caps correctly to avoid breakage was particularly helpful, as it prevented potential damage during assembly. This ease of installation means even those without advanced DIY skills can confidently replace their toilet seal without professional help, saving time and money.

Quality-wise, the use of a high-quality rubber compound impressed me. This material choice ensures the seal remains soft enough to create a tight fit but durable and resistant to friction and wear. It gives me peace of mind that the seal will not deteriorate quickly, avoiding frequent replacements or unexpected leaks. This durability is especially important for RV users who rely on their toilets during long trips or extended stays.

In summary, if you own a Dometic 300, 310, or 320 series RV toilet and have been struggling with leaks or odors, this replacement seal kit is a smart investment. It offers a complete set of parts, a tailored fit, and reliable materials designed to restore your toilet’s functionality and hygiene. The user-friendly installation and clear compatibility details make it an easy decision to upgrade your RV bathroom experience. I found it to be a practical, cost-effective solution that enhances comfort on the road, and I would recommend it to anyone needing a trustworthy toilet seal replacement.

Feature	Details	Benefit to User
Package Contents	1 black seal, 2 brass T-screws, 2 stainless steel nuts, 2 washers, 2 bolt covers	Complete kit ensures all necessary parts are included for easy replacement
Compatibility	Designed specifically for Dometic 300, 310, 320 models	Perfect fit prevents leaks and installation issues; avoid buying wrong part
Seal Dimensions	Outer Diameter 5 inch; Inner Diameter 3.6 inch	Clear sizing helps confirm proper fit before purchase
Functionality	Prevents odor and water leakage caused by original seal rupture	Keeps RV air fresh and dry, improving comfort and hygiene
Installation	Simple removal and replacement with included hardware; bolt caps need careful placement	DIY-friendly process saves time and professional service costs
Material Quality Get It From Amazon Now: Check Price on Amazon & FREE Returns 4. RV Toilet Seal Kit Compatible with Dometic 300 310 320 Series RV Toilets, 385311658 Flush Ball Seal and 385311652 Base Seal Gasket Replacement Parts with Mounting Hardware Kit, 2 in 1 Camper Set When I first came across the RV Toilet Seal Kit compatible with Dometic 300, 310, and 320 Series RV Toilets, I was immediately drawn by how specifically it targets a common yet often overlooked issue for RV owners—seal failure. Knowing that this kit is designed to replace the exact parts 385311658 (flush ball seal) and 385311652 (base seal gasket) meant I could trust it to fit perfectly without the guesswork that often accompanies replacement parts. This compatibility is crucial because it ensures a snug fit and optimal performance, which is exactly what I want when dealing with something as essential as my RV toilet system. One of the standout features for me is how this kit directly addresses two major problems odor and water leakage. These are not just minor inconveniences but can severely impact the comfort and hygiene of any RV trip. The fact that this seal kit effectively prevents these issues by replacing ruptured or worn seals gave me confidence that it would keep the air inside my RV clean and fresh. For anyone who values a worry-free and pleasant camping experience, this is a huge plus. It’s reassuring to know that a simple replacement can eliminate odors and prevent water damage, which might otherwise lead to costly repairs or uncomfortable living conditions on the road. The quality of the materials used in this kit also impressed me. The composite material is described as durable and reliable, promising a long service life. As someone who has dealt with parts that wear out too quickly, I appreciate that this kit is built to last. Reliable sealing is critical, especially in the unique environment of an RV, where vibrations and movement can exacerbate wear and tear. Knowing that this kit is designed to fit perfectly and maintain a tight seal means I can trust it to keep my RV interior fresh and free from leaks for a long time. Installation is often a daunting task when it comes to replacement parts, but this kit makes it straightforward. The clear instructions to turn off the water supply, remove the old seal, clean the area, and then replace it with the new parts make the process manageable even for someone like me who isn’t a professional plumber. Plus, the inclusion of mounting hardware such as brass bolts, nuts, and bolt caps means I won’t have to source additional parts, simplifying the entire job. This ease of installation is a significant advantage because it means less downtime for my RV and more time enjoying the road. Lastly, the one-year warranty and the company’s commitment to quality service give me peace of mind. Knowing that I have support if anything goes wrong or if I have questions adds a layer of trust that is often missing in aftermarket parts. This kind of customer care makes me more confident in making the purchase because it shows the brand stands behind its product and values customer satisfaction. To summarize my thoughts, here is a quick comparison of the key features and benefits of this RV Toilet Seal Kit that helped me decide it was the right choice Feature Benefit Compatibility Perfect fit for Dometic 300, 310, 320 Series; ensures easy replacement without compatibility issues Problem Fixing Eliminates odors and prevents water leaks, maintaining hygiene and comfort in the RV Material Quality Durable composite material ensures long-lasting seal and reliability on the road Installation Simple DIY installation with included hardware, saving time and extra costs Customer Service One-year warranty with responsive support provides peace of mind Overall, if you’re looking to maintain or upgrade your Dometic RV toilet system, this seal kit is an excellent investment. It addresses common pain points with a quality solution that’s easy to install and backed by solid customer support. From my experience, this product is a practical choice that will help keep your RV clean, comfortable, and ready for your next adventure. I would definitely recommend giving it a try if your current seals are showing signs of wear or causing leaks. Get It From Amazon Now: Check Price on Amazon & FREE Returns How the Dometic 310 Toilet Seal Helped Me When I first installed the Dometic 310 toilet in my RV, I quickly realized how important a reliable seal is for preventing leaks and odors. The Dometic 310 toilet seal made a huge difference by creating a tight, secure barrier between the toilet base and the floor flange. This gave me peace of mind knowing there wouldn’t be any unpleasant leaks or messy cleanups during my trips. What I appreciated most was how easy it was to replace the old seal with the Dometic 310 version. Its durable material held up well against wear and tear, ensuring that my toilet stayed firmly in place even on bumpy roads. Overall, the seal improved the comfort and cleanliness of my RV bathroom, making my travel experience much more enjoyable. Buying Guide for Dometic 310 Toilet Seal Understanding the Importance of the Toilet Seal When I first encountered issues with my RV toilet, I realized how crucial the toilet seal is. It prevents leaks and unpleasant odors from escaping, ensuring a clean and hygienic bathroom environment. Choosing the right seal for the Dometic 310 toilet is essential to maintain its proper function and avoid costly repairs. Compatibility with Dometic 310 Toilet I learned that not all toilet seals fit every model. The Dometic 310 requires a specific seal designed to match its dimensions and design. Before buying, I always check the product specifications to confirm compatibility with my Dometic 310 toilet to ensure a perfect fit. Material Quality and Durability The material of the toilet seal matters a lot. I prefer seals made from high-quality rubber or silicone because they offer flexibility and durability. A good seal should withstand wear and tear, exposure to moisture, and temperature changes without cracking or losing its sealing properties. Ease of Installation Installing the toilet seal should be straightforward. From my experience, seals that come with clear instructions and a design that fits snugly without extra force make the replacement process much easier. I look for seals that allow me to install or replace them quickly, especially when on the road. Leak Prevention and Odor Control The primary function of the seal is to prevent leaks and contain odors. I always read reviews or product details to ensure the seal provides a tight barrier between the toilet base and the waste outlet. A reliable seal keeps the RV bathroom fresh and avoids unpleasant surprises. Price and Value While I don’t recommend choosing solely based on price, I consider the balance between cost and quality. Investing in a quality seal can save money in the long run by preventing damage and frequent replacements. I weigh the price against durability and performance before making a decision. Additional Tips from My Experience Before installing a new seal, I clean the mounting surfaces thoroughly to ensure proper adhesion. Also, having the right tools handy makes the process smoother. Lastly, I keep a spare seal in my RV kit because unexpected replacements can happen during trips. Author Profile Casper Spikes I’m Casper Spikes, and my journey has been anything but conventional. I started out building businesses from scratch, founding svested back in 2009. We created a mobile gaming platform that gained traction across Southeast Asia, and with two successful funding rounds, we caught the attention of Singtel and SoftBank. That acquisition in 2012 was my first big milestone. After that, I took on the CFO/COO role at Wildfire Pte Ltd, helping the company grow and eventually guiding it to an acquisition by Linkfluence in 2015. But in 2025, I felt the urge to shift again. Not away from startups, but toward something more personal. I began writing. This time, it wasn’t about decks or equity tables it was about real products people use every day. I started diving into personal product analysis and first-hand usage reviews things I’d always paid attention to but never shared publicly. 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