Bad smell in pantry, especially after dumping

[Randy Dunaway]

Hy all. Have a 390MP. We live full time, I dump once a week, and use happy camper every time. We get a strong odor from the pantry pretty much all the time, and after dump day for one or two days it is extremely unpleasant. I am pretty sure it is grey water and not black tank smell. Is there a way to track this down, i am wondering if a vent pipe is not connected properly or wrongly vented, etc. I order a small camera to drop down the vent from the roof to verify, but not sure what i would be looking for. Any suggestions or things to check is appreciated.

 

[kfindley79]

Hy all. Have a 390MP. We live full time, I dump once a week, and use happy camper every time. We get a strong odor from the pantry pretty much all the time, and after dump day for one or two days it is extremely unpleasant. I am pretty sure it is grey water and not black tank smell. Is there a way to track this down, i am wondering if a vent pipe is not connected properly or wrongly vented, etc. I order a small camera to drop down the vent from the roof to verify, but not sure what i would be looking for. Any suggestions or things to check is appreciated.

I have a 390 as well and I’m having the same issue. I haven’t found the “source” yet but I would love to know if anyone has.

 

[Grassjohn]

Check out this thread, there is also an Alliance “Tech Bulletin” on the subject.

Fixing the holding tank odors in our rig
https://alliancervowners.com/threads/fixing-the-holding-tank-odors-in-our-rig.621/

 

[Whitewolf]

We have a 340 and had a similar problem. For us it turned out that the vent pipe to one of the grey tanks wasn't hooked up. It was separated in the wall.

 

[Randy Dunaway]

I have a 390 as well and I’m having the same issue. I haven’t found the “source” yet but I would love to know if anyone has.

I found the top of my vents were below the roof line, so assume the gasses were leaking back into the RV. I replaced all my vents with the Whirlybird vent, plus sealed around them. Haven't had any issues since.