We are new to motorhoming and need to hear from the experts! We have had a pull behind for years. So my question....When we dump the smell is horrible inside the coach. I dont know if we are doing or not doing something right. We use the tabs/or liquid while parked and smell nothing, but the minute we dump the black tank it will almost make you sick. Please help

Do you keep water in the toilet bowl? There's only two ways this can happen, the smell is coming thru the toilet but if you have water in it I would rule that out and two... thru the vent pipe on top of the Coach. Perhaps if you have a fan or the A/C running your sucking that perfumed air inside?

I recommend you dump - refill with water and dump again. If you use a solution that doesn't work well try RIDX fro RV! We did and it is super!!Hoppy dumps and sorry for your troubles. :Ep.s. I suspect there is **** left over from each dump and RID-X for RV will help.

I'd check the ball valve seal on the toilet first thing. Second, sometimes the bathroom sink is plumbed to the black tank... and it usually has an air admittance valve. That is likely shot, so replace it, or if one is a plumber, replace the trap with a HepVo waterless trap, which not just keeps smells from coming out, it allows air to come in the drain to equalize pressure.

It is definately coming from the toilet. And no we do not leave any water in it? Should we be Halibut214? We dump, run fresh water in it and then dump again. But we dont leave any water in it? We have ordered the Sewer Solution, so hoping this will help "clean" it out.

Do you think the odor is from, sorry, you or leftovers from previous occupants? Filling it up with just fresh water and then dumping might help you figure out whether the odor is from new "stuff" or old stuff.When we got our gently-used new-to-us motorhome I bought a couple pints of bleach and one of those Camco Holding Tank Spray Wands at Walmart. I sprayed the black tank, filled it, then added the bleach and waited.You might try that, if the RidX doesn't clean up what ever is down there.

Sewer Smells | Good Sam Community

mlts22
Explorer
Aug 10, 2015
I'd check the ball valve seal on the toilet first thing. Second, sometimes the bathroom sink is plumbed to the black tank... and it usually has an air admittance valve. That is likely shot, so replace it, or if one is a plumber, replace the trap with a HepVo waterless trap, which not just keeps smells from coming out, it allows air to come in the drain to equalize pressure.
boston_blacky
Explorer
Aug 10, 2015
I recommend you dump - refill with water and dump again. If you use a solution that doesn't work well try RIDX fro RV! We did and it is super!!

Hoppy dumps and sorry for your troubles. :E

p.s. I suspect there is **** left over from each dump and RID-X for RV will help.
Halibut214
Explorer
Aug 10, 2015
Do you keep water in the toilet bowl?
There's only two ways this can happen, the smell is coming thru the toilet but if you have water in it I would rule that out and two... thru the vent pipe on top of the Coach. Perhaps if you have a fan or the A/C running your sucking that perfumed air inside?

Forum Discussion

Sewer Smells

About Motorhome Group

Related Content

Sewer smell

Sewer smell

Sewer smell

Sewer smell

Inside sewer smell