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Old 09-09-2020, 08:08 PM   #1
Junior Member
Join Date: Sep 2020
Posts: 1
Black Tank Issues

I recently purchased a 2011 Forest River Cedar Creek Silverback 35QB 5th Wheel. The previous owner said he didnt back flush the black water before delivering the unit to me. After hooking up the water and plumbing waste lines i found that the black water pull leaver was stuck in the closed position. The previous owner told me to just use some WD40 kn it. It took all i had to pull the leaver out. I connected the fresh water hose to the black water flush inlet and it is obviously plugged. Pushing the leaver back in is just as difficult to push in as it was to pull out?? Can anyone tell me my options to flush and or fre up the sticky leaver?? I know, buyer beware! But Any suggestions are welcome!
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Old 09-09-2020, 09:05 PM   #2
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Join Date: Jan 2018
Location: Central New York
Posts: 301
There are RV valve lube products that may help. I use Thetford Drain Valve Lubricant after dumping the tanks. Both grey and black.

Try to get a penetrating oil like WD40 into the cable. A motorcycle cable lube tool might work...I've never tried. Some folks have drilled a hole into the valve housing to get lube into it. Fortunately I've never bad a valve stick bad enough to try this approach.

Worse case, disassemble, clean, lube, reassemble.
2017 Riverstone 38FB Legacy
2018 F450
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Old 09-10-2020, 08:20 AM   #3
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Join Date: Mar 2008
Location: Southwest Alabama
Posts: 8,630
As Legacy mentioned, it's most likely the cable that's stuck. The WD-40 suggestion is pretty good, but any penetrating lube should help. The good news is that you did get it to move so there is hope for it.

Put plenty of lube on it and operate it many times to distribute the lube.
Salem 29RKSS Pushing a GMC Sierra 2500HD!
Gotta go campin!
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