Originally Posted by HoneyBadger
Correct you are in many cases, but I have known this problem to be caused by things like new MaxxAir hoods causing a different airflow on the roof while driving- nothing "broke" to be fixed.
Plenty of posts here detailing stuff to look at; if the OP has looked for leaks and breaks and empty p-traps and dropped vent pipes, without discovering the cause, there is no reason to endure the stench while they drive. But YYM obviously varies.
I agree with Rich-n-Linda that fixing something broken is the correct way to proceed...
But as HoneyBadger says there has been nothing found 'broken'. Pipes are clear, hardware replaced (although the air admittance valves looked and acted OK to me). I have not checked if p-traps are dry when odor occurs only assume they are since THAT IS WHERE THE SMELL COMES FROM
. We blocked off sink with plastic wrap for no odor once but is not an acceptable permanent fix.
No recent changes in airflow on top of coach nor vents left open to contribute to negative pressure inside. Local RV repair shop is also scratching his head so we are all in good company.
So, on to waterless traps.
2004 Winnebago Brave 32V, 2010 Chevy Equinox LTZ
Roadmaster tow stuff Samsung RF18 Fridge
2+2 USAF Retired