Re: 2009 Prowler 5th Wheel tank capacity
Hi Pasqua and welcome to the RVUSA forum. I searched Google and found a number of similar trailers for sale but none listed any of the capacities for fresh, gray or black tanks.
Hopefully one of the other forum members will have specific info for you. Otherwise, the stone age method would be to get a five gallon bucket and count how many you pour down the drain until the tank fills up.
Somebody will come up with a better answer, I hope. Good luck.