Forum Discussion
SoundGuy
Jun 20, 2016Explorer
bikendan wrote:
we have a 25 gallon black tank and the two of us can go weeks before filing it.
IndyCamp wrote:
How is that possible?
Weeks with two people and a 25-gallon tank?
We have a 37-gallon tank and the longest two of us have gone is seven days, and that was with me peeing in the woods some of the time. You must not be filling the bowl with water before flushing each poop like I do.
Back in our popup days we had a Thetford electric flush 585 porta potti with a 5 gal waste tank which would easily get our family of four through a typical weekend without being emptied at all and a long weekend if we were particularly careful about usage. Based on that I calculated an average person would generate a waste volume of ~ .75 gals per day including flush water. Even if we allow 1 gal per day per person that means a couple might generate at most 2 gals of waste per day ... that in turn means that the 30 gal black water tank on my Coachmen would easily get my wife and I through at least 2 weeks of continuous camping before it would need servicing. Rarely do we ever stay anywhere that long so filling the BW tank has never been an issue and we haven't seen the inside of a campground bath house in years - 30 gals is plenty IMO.
About RV Newbies
4,030 PostsLatest Activity: Mar 20, 2025