We have minor problems with 2 of holding tanks. The black water (toilet) registers 3/4 to full all the time, and our (gally) measures 1/4 to 1/2 when we have emptied them completely. We have even bought the flush adapter to flush the whole system which we did and still no success in fixing the holding tank gauge inside. We have not had any problems camping but when dry camping you always have doubts on useage. Please feel free to email me at
wdanielsc@juno.com if you have any suggestions or at this site. Thanks Bill