After you empty the black tank, turn on the rinser and let it rinse for a minute or so. Open valve and drain. You can leave the water on while you drain. Close the valve for another minute or so, then open again. Do it a third time and your tank is as clean as it's going to get. Close the valve, let your rinser continue for 60-90 seconds to put some water in the bottom of your tank, then turn it off, disconnect and you're good til the next run.
Some coaches have a common dump end where both the grey and black use the same end to dump. Mine is like this. I leave the grey open all the time while camping. (We take long showers and do laundry). When the black needs emptying, I close the grey before taking our showers. I then open the black and drain it. Once it's empty, I open the grey valve and allow the warm shower water to flow into the black for 30 seconds. Close the grey and allow the black to empty. I follow the above procedure and after the third time, I allow the shower water to run into the black for about 45 seconds then close that valve and let the shower water empty cleaning the sewer hose as it does. If I forget to close the grey valve, I use the rinser as described above....Dennis.
BTW...if you use the rinser and get distracted, water will pour out of your black tank onto the roof of your coach, sometimes with disasterous results....D
