12thgenusa wrote:
You guys talking about not using enough water are barking up the wrong tree. It's a plumbing problem not a water problem.
The OP's trailer is probably plumbed in a similar fashion to mine. The black and gray tanks are side by side with the drains on the sides of the tanks facing each other and are are coupled with a tee. From tee there are two more 90 degree turns before the exit point. So waste has to essentially make four 90 degree turns within a very short span. Flow rate and velocity are greatly reduced as a result.
I've been doing as the OP suggested for years and it works great.
Those of you that have a tank with a straight shot out the end won't have this problem.
More water is the solution you will get a better initial flush with more water.
Just imagine putting in more paper than water youir are bound to get a clog.
Now picture using a lot more water than paper. The paper will dissolve.
Not dissolving enough add more water.
I do use the grey water back flush technique but I use it to help clean tank. My black tank does not clog. If your black tank routinely clog you are doing something wrong or your rig is plumbed improperly
