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Old 02-09-2014, 03:15 PM   #1
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Fussy Black Tank Drain

I bought a used '11 Flagstaff 8526RKWS last in Dec (1,250 miles away from where I am now so returning to the dealer is not an option) with a fussy black tank valve. I couldn't get it to close, and I noticed evidence of previous work when I cut away the waterproofing cover on the undercarriage. The shaft that opens/closes the valve is about 6' long (why would anyone design something like that) and has become bent. The only solution I can think of is to replace that shaft and reseal the waterproofing, knowing it will bend again sooner or later. Anybody else have a similar problem with this or other models? What are my chances for success of "brothering" a shorter shaft in the bent area. Thanks for any suggestions.

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Old 02-09-2014, 03:37 PM   #2
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Why not leave that one open and alone and install a new one near the end where you can control it better?

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Old 02-09-2014, 03:45 PM   #3
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What Ford Idaho said would likely be the cheapest and easiest fix.

If you want to retain the same 6' long rod, I would replace the bent rod them weld in some round tubing "guides" for it to go through so it isn't as flex when you push/pull on it.
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Old 02-09-2014, 04:17 PM   #4
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If it is the cable and housing you are talking about, it needs to be tied down about every 18" as per install instructions. Not always done at the factory (never). A new cable is exactly that long and is not cut to a workable length. You can get a new cable (maybe $15) and cut it to length and get it to function way better. Hope this helps a little.
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Old 02-09-2014, 04:23 PM   #5
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I have never seen what you have but could you sleeve the shaft with length of pipe. If you fit the pipe tight to valve and to where the handle mounts the pipe would be stationary while the shaft would slide through without being able to bend.
As for a second valve, I think I would worry the length of pipe would fill with solids. Grey water would work for sure but black water I would worry.
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black, black tank, drain, tank

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