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Old 09-25-2015, 12:15 PM   #1
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2012 25' FB Flying Cloud
Grand Rapids , Michigan
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Black Tank Valve Help

I'm having a problem with the black tank valve on my 2012 - 25. The valve closes enough to stop any water running but not enough to attach the holding clips to the handle. I've run water through thinking something may be stuck, I've run the valve in and out several times, and run down the road with stuff sloshing to clear any possible block but nothing seems to work.

Any ideas?
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Old 09-25-2015, 12:40 PM   #2
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Wichita Falls , Texas
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Is this a recent development? Can not the length of the value arm be adjust. I think I remember seeing a lock nut behind the valve handle on my AS black valve handle.

Kelvin
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Old 09-25-2015, 01:39 PM   #3
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Yes, you can loosen the lock nut and adjust handle length.
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Old 09-25-2015, 02:18 PM   #4
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Thanks, I'll give that a try
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Old 09-26-2015, 11:57 AM   #5
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We are having the same problem. Everything was fine until a few days ago and now it won't close enough to reach the pins.
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Old 09-26-2015, 12:14 PM   #6
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2007 27' Classic FB
Ridgefield , Washington
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I have this problem periodcally. When I run a blacktank flush it closes fine. Not sure what the issue is.
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Old 09-26-2015, 12:59 PM   #7
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1996 34' Excella
Elberta , Alabama
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I recently had the same problem. Rebuilt the both valves, even though the grey water was still OK. Found an amazing amount of dirt and crud buildup in the black water valve seat.
Amazing what a difference that a new set of seals and gaskets did.....

Larry
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Old 09-26-2015, 01:05 PM   #8
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1967 26' Overlander
Spartanburg , South Carolina
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I am not too sure about you folks with newer rigs but when I had the same prob with our '67 I bought a soft bottle brush with a long handle and with the valve wide open, ran it around the valve seat several times to dislodge the debris that was impacted in it. That was over 20 years ago. Since then I make sure the tank is full before I open the dump valve. Then, leaving the valve open, I fill and flush the toilet, which holds about a gallon of water, three times to wash any residual solids out of the valve seat. You guys with newer rigs can do this with your tank washing systems. Never a prob since (knock on wood). I hope you realize the valve should always be left closed until time to dump, otherwise debris will accumulate in the valve seat.
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Old 09-26-2015, 07:26 PM   #9
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2005 31' Classic
Gretna , Nebraska
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That is a problem with the newer trailers - no access to clean the valve seat. There is too much plumbing with the two tanks compared to the earlier units that only had a black tank.

Dwight
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Old 09-27-2015, 08:05 AM   #10
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2012 25' FB Flying Cloud
Grand Rapids , Michigan
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Well, with Urban Air coming up this week it's now in the hands of the local repair guys. I tried everything I could think of and nearly all of your suggestions - thanks! - but really didn't want to risk leaving a souvenir for the nice folks of Eaton Rapids. ��
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Old 01-16-2016, 09:18 AM   #11
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Same problem with 2015 27 flying cloud
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Old 01-16-2016, 09:40 AM   #12
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Let us know what they find
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Old 02-03-2016, 08:34 AM   #13
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2011 27' FB Flying Cloud
Box Elder , South Dakota
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We just had the same problem. Over time, sludge and debris build up in the tank and around the flush valve. You can use a good cleaner, like Happy Camper Extreme Cleaner, or you can purchase a "Flush King" back flush devise. After filling the tank at least 1/3 full, and letting it soak for 24 hours, we tried the Flush King. After several back flushes, all the loose debris was flushed out of the tank and away from the valve. The valve is, once again operating normally. The Flush King is now part of our "Full Timer" inventory !
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