Dometic 320 issue

[Gnomads]

Originally Posted by l001952119

I installed a 320 today. Bowl held water for a "few" minutes. Now to gain warranty on new toilet!

Pour in hot water and let it sit. It will hold water

[5picker]

Originally Posted by Bob K4TAX

OK understand. Water expands as it freezes. In an enclosed environment that can and does break things. I don't see the toilet bowl as enclosed.

Anyway, I lubricate the seal about twice a year in our Dometic 310 with food-grade silicone grease. Some use Vasoline which also works.

It is just one of those items in an RV that requires regular maintenance. Also for the non-RV people visiting, be sure they are instructed on how to properly use the toilet. Saves cleaning up a mess later.

Bob

Originally Posted by Larry-NC

Okay, Bob. Why food grade? You're not planning to dine from the bowl, are you?

Originally Posted by Bob K4TAX

Does not contain any petroleum-based chemicals that can damage the rubber ring.

In the Service, the head had to be clean enough to eat out of. Otherwise, one scrubs the entire barracks floor with a toothbrush.

Bob

But doesn't Vaseline contain petroleum products and you suggested earlier, was OK to use?

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[TitanMike]

Originally Posted by Larry-NC

Okay, Bob. Why food grade? You're not planning to dine from the bowl, are you?

Perhaps he's looking out for a dog that might decide to take a drink.


I believe the bowl valve seal is neoprene and could care less if it encounters petroleum based products.

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[bubbles]

Originally Posted by TitanMike

I believe the bowl valve seal is neoprene and could care less if it encounters petroleum based products.

Nope, it's rubber.

[Bill and Gail]

I use Plumber's Grease to lube the seal. Bought it in Lowes.

[TitanMike]

Originally Posted by bubbles

Nope, it's rubber.

But which of the 10 different compositions of rubber is it?



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[bubbles]

Originally Posted by TitanMike

But which of the 10 different compositions of rubber is it?
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I believe it is made from a blend of rubbers but is not synthetic (neoprene). Blends are most likely not published.

[TitanMike]

Originally Posted by bubbles

I believe it is made from a blend of rubbers but is not synthetic (neoprene). Blends are most likely not published.

That's strange as most "seals" are made from Synthetics. Most common are Nitrile (NBR) and Neoprene due to both chemical resistance as well as abrasion resistance.

[80 Cruiser Rod]

Originally Posted by Gnomads

I upgraded from a Dometic 310 to 320. Not too bad other than twisting myself into a pretzel lol.
My issue is that the seal is off centered. I took it out and reseated it a few times, tried the hot water and that worked for a bit. Now the winter and it will not hold the antifreeze. I know the manual says to not take the toilet apart but I feel if I can get to the seal holder I can center the seal ring. I included a picture.

Is there any reason why I shouldn't separate the base?

I installed a Dometic 320 in my camper last season and it would not seal good enough to hold water for more than a day. After trying everthing to greasing it, resealing it I emailed Dometic suggesting the new seal wasn't good and they sent me a new seal which has worked great. Maybe your toilet was sitting in a warehouse for too long and the seal hardened and needs to be replaced.

[Gnomads]

Originally Posted by 80 Cruiser Rod

I installed a Dometic 320 in my camper last season and it would not seal good enough to hold water for more than a day. After trying everthing to greasing it, resealing it I emailed Dometic suggesting the new seal wasn't good and they sent me a new seal which has worked great. Maybe your toilet was sitting in a warehouse for too long and the seal hardened and needs to be replaced.

Maybe. Will give it. Shot

[JimM2109S]

Crisco vegetable shortening works well for lubricating most all of the rubber or similar type gaskets you will encounter. Use a spoon to extract enough for the job so that the cook in the camper doesn't get upset that the shortening has become contaminated.