Dometic Genuine OEM Flush Ball Seal Kit | 300 and 400 Series and Sealand Toilets | RV Toilet Repair and Replacement -(385311658)

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.

Fits perfect and very easy to install

The Dometic genuine flush ball seal worked perfectly! No more water leaking out of the toilet bowl!

Much more expensive than the cheap knock-offs, but these actually work! I installed it as per directions, included in the package, and it worked first time. After messing about with the cheaper ones, including hot water to soften it up, I gave up as they would not hold water in the bowel and opted for this Dometic seal; VERY GLAD I DID. I wasted a lot of time on the cheaper ones.

I'm giving this a 5-star rating because I was tired of dealing with the seal and reseal of our RV toilet. My husband purchased the generic seals last season, and I was finished dealing with them!! No more dealing with that mess! The genuine product is thick, and the price is worth it! Instant seal and haven't had any issues. Instructions are easy to follow, but plenty of videos if needed. If I can do it, anyone can!!

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.

I am upping my review. We came back from a RV trip a month ago and yes the seal did not hold water. We parked the RV and put water in the bowl to reduce odor. Surprisingly, it has been holding water. I don’t know why but it now works, year ago I replaced my RV toilet with a new Dometic 300 series toilet. Less than 6 months later it would not hold water in the bowl. I bought some non-Dometic seals, that had good ratings. They failed. So I bit the bullet and paid $33 this Dometic seal. The seal came with good instructions, which I followed to the Letter. After install the water ran out of the bowel just as fast as the cheaper ones.

Great figment

After trying cheaper knockoffs that didn't work we ordered this seal and it worked perfect. Don't try to cheap out, by OEM products like this.

Easy to fit identical to the original. Would highly recommend!

Easy to install and solved the issue quickly. U-tube video provided clear and easy instruction for replacement

I use these in my dometic toilet in our cottage. They seal well and last a long time. Best to lubricate them 2x a year. (I use Thetford Toilet Seal Lube)

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