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Old 10-11-2020, 04:15 AM   #8
Senior Member
Brand: Thor Motor Coach
Model: Citation
State: Texas
Posts: 385
THOR #8139
Thanks to Covid19 I've completed a lot of projects I've been avoiding.
Last week this one made it to the top of the list.

Only one product has worked for me, BUT I can't find it.
EXTREME CLEANER by Happy Campers - RV & Marine Extreme Tank & Sensor Cleaner

And one tool.

Very limited success with the built in system, uses too much time and water and will lose the battle.
Limited success with the tool down the commode if used often but it will also eventually fail.

This time I went with the "what ever it takes" method

Got my 5gal bucket, hazmat suit covid mask unhooked the slinky hose, hooked the house water hose to the tool opened the dump valve and pushed it up and into the tank.
I was really surprised at how much paper (and stuff) came out!
The 5gal bucket needed to be emptied a couple of times.
I dumped it in the house sewer clean out... lots of fun, smell not bad, so we do get something for ALL those chemicals .

Good news it worked
First time the black tank has shown empty in over 2 years.
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