Thank you for checking my post. I have searched with no posts detailing my current situation. I have a 2008 Monaco Monarch with a previous owner who I believe did not take very good care of the unit. I have just recently been able to use the black tank flush valve. Sadly, I do not think the previous owner had ever used it. It is equipped with a sanicon system. (I am wondering if the buildup cleared from that valve is the culprit of my current situation)
The tank reads empty even though you can clearly see the tank is almost to the top of the black water tank. When flushing with the sanicon the grey water empties completely (it reads that anyway and plenty of "grey" water comes out) but the black water does not. I have tried shooting water into the system thinking the sanicon may have been clogged up. I do this by using a female to female attachment with a hose and turn it on. With the grey water I can hear the bubbles it creates in that line/tank. When I try it with the black tank the contents in the black tank begins to swirl. However, when I try and drain the black tank it once again will not empty!
It is harder for us because we are on the road now and finding dump stations is a bit harder and I can/will not sit and try to figure this out while a line of other RV's line up behind me. Has anyone experienced this? Would a plunger do the trick? I have added a few of the cleaning/deodorant packets as we drive today to see if it clears anything down there. I am trying my very best to keep from dropping the sanicon but its looking like it is in my future...