Quote:
Originally Posted by 2 friends
We tried that as well even used the wand to clean it all out....camp ground reported to us upon pump outs that no extra water came through even after first use
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That doesn't mean it is adequately flushed out tho.
First thing I do when breaking camp is dump the black tank and then let the in-tank rinser run for about 20 min. We also fill the black tank to full or near full before opening the dump valve. It also helps to NOT scrimp on water when flushing. Trying to conserve water only makes it worse.
You should be able to look down the toilet and see the tank bottom using a flashlight. You'll know it's clean when you can see the ABS tanl floor and maybe some droplets of yellow ABS glue.
There are many shapes, sizes and configurations and a back-flush elbow will work well on some and little to not at all on others. That might be worth a try. Our back-flush elbow does nothing.
IF all else fails, you could try a chemical to soften and dislodge a buildup. Our owners manual says to use Liquid Drano (won't hurt metal or plastic.) We use it once or twice a year and have been for 5+ years no problem and it gets the tank back to factory clean condition.