Jump to content

Toilet to black tank seal


Recommended Posts

I did a search but didn’t find anything on this topic.   I’ve noticed a strong black tank odor when the bathroom exhaust fan is on, and the odor seems to be coming from where the toilet (standard flush toilet) meets the floor.  Seems that the exhaust fan is pulling odors up from the black tank somehow.   There’s water in the toilet bowl so I don’t think the odor is coming up from the black tank through the bowl itself.   I think there may be an issue with the seal between the toilet and black tank.  Before I pull the toilet up, for anyone who has taken out the toilet for maintenance, do you have any photos of the seal that is used between the toilet and the black tank?  Just so I have an idea of what to expect it should look like?   Is it a standard toilet flange and wax ring?
Thanks in advance. 

2019 Oliver Legacy Elite II - Hull #461

Tow Vehicles:

Primary - 2019 Ford F-250

Backup - 2019 Nissan Armada 

 

ALARCODEINKSKYMONMNYNCOHOKPATNTXUTVAWVxlg.jpg.bc136094bef415679018eafd8d4046ad.jpg

Link to comment
Share on other sites

  • Moderators

If you're getting odors, you may have a venting issue. A birds nest, leaves,  etc, in the vent can cause odors to "back up." If your toilet holds clean water, even with the lid up, you probably shouldn't smell anything, imo, if venting is good and clear. 

In the meantime, close the lid after use. Pour just a little orange tank deodorizer in the bowl, along with the water,  after each use. The orange stuff from Walmart is cheap.

Rv toilet seals are not typically the same as home seals. It's  a pipe to pipe connection. Proper venting is important. As is a proper  clean valve seal within the toilet. 

We had an issue once in a rental delivery. I cleaned and  lubricated the bowl toilet  valve seal, and we were fine for the next 4000 miles.

2008 Ram 1500 4 × 4

2008 Oliver Elite, Hull #12
 

 

Link to comment
Share on other sites

  • Moderators
4 hours ago, FrankC said:

...Before I pull the toilet up, for anyone who has taken out the toilet for maintenance, do you have any photos of the seal that is used between the toilet and the black tank?  Just so I have an idea of what to expect it should look like?   Is it a standard toilet flange and wax ring?
Thanks in advance. 

Frank, I don't have any pictures but Lee Slusher and I swapped out Hull #050's original plastic toilet with a porcelain throne while out in Quartzsite a few years back.  It was a simple matter of disconnecting the water supply line, removing a couple of bolts and lifting the toilet out. There was no "seal" as in a wax ring, just a smaller pipe exiting the bottom of the toilet and going well into a slightly larger flange on top of the black tank. Also, there was no filth as I expected.

All that said, remember that the gray and black tank vents merge under the vanity and exit out the top of the trailer. If the outside vent exit is somehow blocked, theoretically sewer gases could back up and exit the shower drain. That's close enough to the toilet base to perhaps make the stink source confusing.

I once had mud daubers partially close up my vent pipe. I just took the cap off and put a water hose down inside it and flushed them all back down through the drains and into the waste tanks.

  • Like 3

Steve, Tali and the dogs: Reacher, Lucy and Rocky plus our beloved Storm and Maggie (both waiting at the Rainbow Bridge)

2008 Legacy Elite I - Outlaw Oliver, Hull #026 | 2014 Legacy Elite II - Outlaw Oliver, Hull #050 | 2022 Silverado High Country 3500HD Diesel 4x4 

 

             801469912_StatesVisitedTaliandSteve08-23-2021-I.jpg.26814499292ab76ee55b889b69ad3ef0.jpg1226003278_StatesVisitedTaliandSteve08-23-2021-H.jpg.dc46129cb4967a7fd2531b16699e9e45.jpg

 

 

Link to comment
Share on other sites

Frank,

Have you checked and added water to the shower drain trap lately? We had a very slight odor emitting from the shower drain and I poured a few cups of water down the shower drain and the odor immediately went away. Our Ollie had been sitting with the dehumidifier on and I suspect it dried out the trap allowing an odor to escape up through the shower drain.  We always run the dehumidifier 24X7 so we periodically add water to the sink trap, shower trap, and galley sink trap. Might be worth a try.

 

 

 

  • Like 3

2020 Ford F-250 6.7 liter Powerstroke Lariat Ultimate “Tremor” High Cap tow pkg  - 2020 OLEII - Hull #634 

 

Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share

×
×
  • Create New...