Ok, so yet another posting. Suppose I could have just added this under my build thread, but in case anyone stopped reading it, I wanted as many answers as possible.
So we all know what happens if you dont vent you black water tanks. Gases build, and the tanks go BOOOOM. usually covering the bathroom with a new 'paint job'.
So why do portable toilets not require vents? Is the 4-5 gallon capacity not sufficent to create a problem? This is something that has been on my mind for some time. I bought a portable few months back to use in 'emergencies' (I have used it a total of 2 times since I bought it..but it still beats the 5 gallon bucket) and I dont see it getting huge usage, but I wondered about the gas buildup.