Poop Pyramid

You are suffering from the dreaded poop pyramid. This occurs when people use the black tank wrong. What they do is park it someplace hooked up to the sewer and leave the black tank valve open all the time. This means there is not enough liquid to empty the tank and send the poop to the actual sewer. So poop builds up in the spot where the toilet empties into  the tank. What you should do is always keep the black tank valve closed when you are parked and when the tank is at least three quarters full then you empty it. And whenever you use the toilet use a lot of water. The chemicals are worthless.

Now what you can do to get rid of the problem is to buy a flexible black tank wand like this:

http://www.amazon.com/Valterra-A01-0187VP-Flexible-Tank-Wand/dp/B000BGHYE8/ref=sr_1_3?ie=UTF8&qid=1444938342&sr=8-3&keywords=black++tank+wand

Turn off the water to the RV, open the flush valve on the toilet and block it open. Then hook up the wand and run it into the bathroom through the window, put the wand down the toilet and spend at least a half an hour hosing down the inside of your tank. It helps to have a clear pipe hooked up between the black tank outlet and the sewer hose like this:

http://www.amazon.com/Valterra-T1026-1-45%C2%B0-Clearview-Adapter/dp/B000NCS7GE/ref=pd_sim_263_52?ie=UTF8&refRID=04E0YAAAYPH3K62QBMJC

Then have someone outside watching the clear pipe while you are inside spraying. When the water runs clear for about five minutes your problem will be solved. Like I said it will take at least a half an hour of spraying before the water runs clear because typically the poop pyramid is as hard as cement from sitting in a very hot black tank. And in the future you will always remember to use a whole lot of water. After I dump I put about five gallons of water in the black tank to start off with. Every time I flush I count to five before I release the handle. Poop pyramids will breed flies in a lot of cases so if you are seeing flies in the RV that is the source.