Genuine OEM Flush Ball Seal Kit 385311658 | for 300 and 400 Series Toilets

Fits perfect and very easy to install

Bought the cheap seals and they did not work. Ended up buying this one and it held water and worked perfectly. Dometic 310 style

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.

Expensive compared to the cheap knock-offs. But it works! The genuine Dometic seal appears to be thicker, stiffer, and shaped slightly different than the knock-off from another maker that I tried first. These differences press the lip seal down against the white ball valve more firmly. The Dometic seal works; the knock-off didn't work.

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.

Purchased for replacement/maintenance. Fit perfectly. Nice and thick.

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

Don’t waste your money and time on the cheaper aftermarket seals. After buying less expensive 2-packs that always leaked, I decided to spend the money on the manufacturer’s seal and it held water. I could see the obvious difference in the quality and size between the cheaper ones and the actual Dometic seal.

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)