Urine Smell From Half Bath Toilet

After contacting Dometic, I was told I have a Thetford Toilet. So I contacted Thetford and waiting for a reply as what to do.

Same here. Dometic offered to replace our defective toilet.

sehunter wrote:
I don't know if we have the same toilet but my Sealand Dometic (vacuum) toilet did the same as you are saying yours is doing. My first thought was my aim was getting pretty bad or I wasn't as clean as I could be.
I called Dometic and it turned out some of their toilets are defective at a mating surface and there is nothing I could do but replace it. Fortunately it was under warranty. They sent me a new one and I did the work.

The Dometic on my 2014 Georgetown was defective also. They had a bad bad batch made around 2013. I just called them last year after learning this. They asked for the serial # on the toilet and said that it was one of the ones that had an internal leak and sent me a new one at no charge.

When we had that in the house the seal around the base of the toilet was leaking every time the toilet was flushed, but we didn't know it. When we tore it up, the urine was getting into the wood under the flooring and that was what caused the smell. Like you, no matter how much bleach I used to clean you couldn't get rid of it. My guess is that something is leaking when you flush and you have the same type of issue. Much more noticable on warm humid days.

We had this problem in our previous RV. It had a Sealand porcelain toilet mounted on a raised carpeted platform. The seals where new & it held water fine. I removed the toilet to re-check and founded lots of barely visible hair line cracks in the porcelain near the bottom of the toilet. I think it was weeping, un-noticed, into the carpet and smelling.
I'm not sure what caused the hair line cracks, maybe 10 years of vibrations in the RV or extreme range in temperatures between winter storage and summer use.
I replaced toilet and upper platform carpet and the problem went away.

gutfelt wrote:

ksg5000 wrote:
Few thoughts. Make sure the black water tank vent pipe is operating correctly, dump some bleach and soap in the black water tank and drive around/dump, check/replace the air vent under the bathroom sink (many bathroom sinks are plumbed to the black water tank)- they only cost about $10.

those vents under sinks are grey water vents

Depends on the rig. Given the proximity to the toilet some mfg plumb the bathroom sink to the blackwater tank. When I had black water smells in my bathroom area changing the the anti syphon air value under the bathroom sink fixed the problem.

I don't know if we have the same toilet but my Sealand Dometic (vacuum) toilet did the same as you are saying yours is doing. My first thought was my aim was getting pretty bad or I wasn't as clean as I could be.
I called Dometic and it turned out some of their toilets are defective at a mating surface and there is nothing I could do but replace it. Fortunately it was under warranty. They sent me a new one and I did the work.

have you checked that when you flush, the entire bowl gets rinsed. i suggest there is not enough water pressure to rinse the bowl properly. some section is not rinsed and smells

Gray water tank can smell real bad. Flush it out, then add Pine-Sol. The powerful scent stuff. If you smell Pine-Sol in the bath, you need to check the vents.

If no change add Pine-Sol to the dumped black tank and smell check.

Dry P trap on the washer can also cause problems.

"those vents under sinks are grey water vents" Suppose to be but not always true