Originally Posted by Jackm
The waste tank vent pipes were not actually designed to eliminate odors. Their principal function is to vent potentially hazardous gasses and permit draining of the tank with the toilet valve closed. The various after-market products discussed here are an attempt to use the vent pipe to help alleviate odors.
Not to argue, but anytime you're venting hazardous gases they typical come from poop or whatever goes down the drain so in my view, they are one and the same. Vent the hazardous gas, the smell goes with it. If the vents don't vent during flushing then everybody would be complaining about stench in the rig, the designers designed the system so when you flush, air doesn't come up the toilet into the RV.
But then, I'm just guessing, this just seems logical to me.
In most cases, the passive solutions (i.e. rotating vanes) work quite well. However, on hot, still days, they aren't much better that the OEM vent pipe cover. That's why I plan to put in a fan to help when there's no breeze and the temperature is high. Thanks for the chat.
Agreed, I this is why I also plan on putting the Lil Stanker inline in the vent pipe so I can fire it up every time we camp.
Have a great week Jack!