cross country wrote:
Great stuff! Now I wonder what the "empty" tank would look like without a three foot drop at the dump? Many hook-ups require a 20 foot run with a bump up to accommodate the elbow connection into the drain pipe. Some drain pipes are above ground level exasperating the condition for good draining.
The point is simply this; with a 6 inch drop over 20 feet of slinky and then a bump up...causing back up and only the pressure of the tanks contents, would the results of the tests be basically the same?
Would there be so much left behind that only continuous filling and flushing could be performed to clean the tank?
Could this by why so many are aggravated in dump line ups? Straight pipes 2 feet up simply drain more efficiently than low valves with numerous elbows?
Cross Country has a very good (and important) point. The first thing I noticed was the fact that your tank, being about three feet off the ground creates significantly more "head pressure" (see how water pumps work) which has a big influence on the discharge flow rate. This flow rate largely influences how much or how little debris is left behind. I also think that your additive test (breaking down the waste) will make the first set of tests pointless other than showing how the clear sections appearance can be misleading.
I still appreciate your time and effort though to enlighten and help the community and I look forward to the additive test videos. I also think the experience of long time RVers who use detergents of some sort and agitate them while traveling between stops is excellent information.
