Strong odor

[ragoodspeed]

In Florida at this time and have been using the two power vents a lot on my 36 VSB. Yes, on out exhaust. I have noticed a moderate holding tank odor in the rear of the coach that we have never smelled before. I thought perhaps the small under sink vent had gone south so I replaced that with no change. If I shut the vents I stop the odor. I am guessing that the two vents on the roof that are situated near the bathroom vent must be the problem? Just to close to the vent. Has anyone else had such and issue? I have checked the vent stacks and all appear in one piece. Thanks

[twc88]

All I can say is my last coach had a strong holding tank odor every time I drove it. I figured it out to be the vent caps on the roof, I changed them to the kind that spin around to always create a negative pressure in holding tanks. Never had another smell, I had also tried changing the under sink vents to no avail. Maybe the wind is just right or wrong.


TomC

[Old-Biscuit]

Could be another Air Admittance Valve....(AAV)
Should be one on Kitchen sink drain line AND one on bathroom sink drain line


With rood fans on EXHAUST they shouldn't be pulling any odors in from Roof Vent Lines....


Tape plastic bag over 'all' AAVs...run fans in exhaust and check for odors