Black tank flush system clogged

[WannaDmxsub]

Any suggestions for un-clogging the lines?
The back flow preventer is working as it should. I ran a "fish" as far as I could down the line. It make it to the "T". I tried compressed air but it didn't clear the lines.
I really don't want to drop the tank...

[WannaDmxsub]

Any suggestions for un-clogging the lines?
The back flow preventer is working as it should. I ran a "fish" as far as I could down the line. It make it to the "T". I tried compressed air but it didn't clear the lines.
I really don't want to drop the tank...

[Kablewizard]

We have been having a problem too. The guage wants to read 2/3rds even after a dump where
I leave it open in the campground for an hour with the flush on.
I asked Don and he suggested pouring an extra dose of orange TCP in and fill the tank and drive around, we shot it everyday when we left the Rally and dumped befor we left a park and 1/2 tank driving, it read empty when we got it empty the last time. I also think another problem might be not enough water put in the tank after dumping and before storage. I read that you should have about 2 gallons before placing your tabs or chemical in to cover the bottom, and half a tank when stored in the summer for any lenth of time.

Good luck