Originally Posted by DDickey
I'm about to pull the shell off of a '57 22' Custom and I want to add new black and gray tanks. The bathroom and the kitchen will be street side, and from back to front I'd like to put in a gray tank for the lavatory and shower, a black tank for the toilet, and another gray tank for the kitchen. I'd like to keep the tanks inside the belly skin, but I'm uncertain how to plumb the drains from the tanks. Any suggestions or expertise is greatly appreciated.
The first major step is to measure the area where you plan on installing the tanks.
That will guide you as to what you can and cannot do.
Also, what size tanks you install is a function also of "where" will they be located in the trailer, so that you will know the weight and balance effects the contents of those tank create.
Lastly, 231 cubic inches equals one gallon of water. You can calculate the capacity of the tanks you choose to install, as an example a tank that has dimensions of 48 inches long by 24 inches deep and 5 inches in height equals 5760 cubic inches. Divide that by 231 and you would have a tank that would hold 25 gallons, but subtract a little because of the thickness of the tank.
Following the above should save you a lot of grief and or oh oh's.