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05-08-2008, 03:31 AM
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#1
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Established Member
Join Date: May 2006
Location: Dalton
Posts: 35
M.O.C. #5739
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Black Tank Flush
Can anyone give me a hint what's going on here? I hooked up hose to flush and no water will run thru!! Help! Thanks. John
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05-08-2008, 04:48 AM
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#2
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Montana Master
Join Date: Oct 2004
Location: Gardnerville
Posts: 749
M.O.C. #2165
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It could be that the spray head has become clogged, most likely, or that the antisiphon valve isn't working. The valve is typically the easiest to check, at least on some units. If it works, then try filling the tank and including some water softener like Calgon so that whatever is blocking the spray head softens, turn the water on and off a lot of times so that the pressure can blow out the obstruction, and you might even try putting some water softener in the line between the antisiphon valve and the spray head.
Bob
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05-08-2008, 05:32 AM
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#3
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Montana Master
Join Date: Sep 2003
Location: Forestville
Posts: 6,025
M.O.C. #496
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My guess is the antisiphon valve is not working. I do not know which unit you have but my valve was located under the bath sink. I removed it, pulled the hoses down into the basement and installed a pvc on/off valve. The flush works great now.
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05-09-2008, 02:50 AM
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#4
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Established Member
Join Date: May 2006
Location: Dalton
Posts: 35
M.O.C. #5739
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My antisiphon valve is fine. Just wondering how much calgon in the tank to loosen this up. Also, how about blowing it out thru the line. Thanks for imput
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05-09-2008, 03:04 AM
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#5
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Montana Master
Join Date: Oct 2006
Location: _
Posts: 5,238
M.O.C. #6337
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Not sure if this is the same as problem you are describing, but???
This January when we got to the RGV, we had trouble with our sprayer, did not seem to be spraying right.
Believe what Al did was fill the black tank so that liquid would go past the sprayer level. Let it soak. Not sure, we might have added some Calgon (a couple of capfuls of liquid at the most). Also might have added a tad bit of liquid laundry detergent (All).
After soaking for a day or so, drained and started the flush thingy going, let it go for a LONG time, with tank open to sewer. I think he ran that sprayer for well over 3 hours.
Course, you cannot "see" the problem, but our take on it was that either minerals or paper or something had dryed on the sprayer head and restricted the flow.
After the long soak, and the hours of spraying, it was no longer "clogged" and we had no further trouble with it.
Good luck with your difficulities. Let us know how you fix it.
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05-09-2008, 04:48 AM
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#6
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Montana Master
Join Date: Jul 2003
Location: Clearwater
Posts: 10,917
M.O.C. #420
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Last summer our flush would not work. I tried everything I could think of including using the air compressor to push air thru. At 135PSI it didn't work.
When we arrived a week early in Goshen for the Fall Rally my first stop was the Service Center. They had to replace the spray head. They did show me the old head and it was packed solid with crap. Their only solution to fixing the problem was to replace the head. Now these workers were the service TECHS and not someone sitting in an office.
I ALWAYS use plenty of water when flushing the toilet. I ALWAYS use the spray during and after dumping. My black tank when dumped is ALWAYS flushed thoroughly, no exceptions. The only explanation was the few times that we didn't dump due to the fact that we only spent a night or 2 may have caused the crap to plug the sprayer. We now dump and flush after every stop over. If that's not possible I will put as much as a half tank of water into the black tank thus breaking down the crap even further.
Since leaving the rally last September we have not had any further problems.
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