Dometic 385311658 Flush Ball Seal Kit 310 Toilets

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.

Perfect fit and easy to install.

My trailer toilet would not hold water, it gradually leaked out, so I went the cheap route and purchased a two pack of non brand seals from Amazon. I really did a good job cleaning it all up and installed the new seal. The toilet leaked water quicker than with the original, old seal. I installed this seal in 2024 and it works perfectly with no leakage. To me it was on the expensive side, but it works like new so I recommend it. Don't waste your money on a cheap imitation like I did.

Works great! Easy to install on Dometic 310.

OK - stupid me, when the BF and I left for our camping weekend, we usually fill the water tank with water and ice to "clean" or swish around to help clean it out after a weekend. Well, that's usually my job and I forgot to pick up a bag of ice and dump it down the toilet......so, we stopped for gas, about an hour away from our campsite and I bought a bag of ice to dump down the toilet. Dummy me, just opened the bag and dumped, but it didn't all go down easily, so I started chopping at it with the toilet brush and kept working the pedal and jamming the ice down. Well, we get to camp, set up, and here the toilet doesn't hold water!!! BF looks at the toilet and determines the gasket is GONE. He is one who likes to "just bring it in" to get things fixed -- whereas I am more one who likes to at least attempt a DIY before bringing it in (where reasonable of course I wouldn't take on huge repairs myself). Especially camper/RV repairs are SOOO expensive!!! So, we survived the weekend, and I researched if this existed and it does!!! The BF was ready to schedule an RV appointment and I instead went on Amazon and ordered this gasket -- I watched YouTube videos on how to replace it - It definitely looked easy enough that even I could replace it. But lord knows I did NOT want to touch this area of the toilet!! LOL So, I forced teh BF to watch the same videos and sent him out with the lube and my new gasket! Within 10 minutes he was back in the house, washing his hands (HEHE) and the gasket was replaced!! WOO HOO!! You are very welcome, sweet boyfriend!!! Saved him a huge bill!!! HEHE I highly recommend, and I also learned my ice lesson.....

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.

Works after it gets seated. Takes a little to get it on then has to seal itself.

This was super easy to replace and fixed my old, Dometic 310 toilet right up!

J’avais originalement installé un seal ‘’Jabber’’ à bas prix, mais cela n’avait pas réglé le problème. Celui ci une fois installé en quelques minutes a réglé la fuite d’eau de la toilette

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

Best on the market

The right product for the repair of my RV. I like the easy of application.

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)