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Old 04-12-2007, 09:42 PM   #1
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Has anyone had a problem with the black tank flush being clogged? When I hook up the hose to the flush connection no water seems to go into the black tank. Am I missing something? How can I clean this out? Obviously the first step will be to empty the tank.
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Old 04-12-2007, 09:42 PM   #2
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Has anyone had a problem with the black tank flush being clogged? When I hook up the hose to the flush connection no water seems to go into the black tank. Am I missing something? How can I clean this out? Obviously the first step will be to empty the tank.
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Old 04-13-2007, 03:41 AM   #3
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Hi -

My guess is the flush-nozzle has gotten clogged-up.

All of the black-tank flush systems I've seen have a vacuum-break valve plumbed into that line somewhere. It helps keep anything from back-washing into your fresh-water system when you shut off the tank-flusher by releasing any pressure/vacuum in that line when the waterflow stops.

However, it's sometimes common for bits of .... ahhh..." material"... to get sucked a little ways back into the tank-flush nozzle holes. Not far, but just enough to begin to create a little clog, and with continued usage it may get to the point where it gets completely stopped up.

I'd suggest first taking off the nozzle at the tank, and checking it for stoppage. I've successfully cleaned mine out and reused it, but some folks just replace ˜em. They're inexpensive.

If that isn't the issue, at least you can see if you do get any waterflow at that outlet when you turn on the tank-flush system, and can then check backwards up the line. Next guess would be something stuck in the vacuum-break, or maybe the break-valve itself. Or perhaps the line is pinched/kinked somewhere?

HTH,
Ron
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Old 04-14-2007, 05:00 PM   #4
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I would do like Ron said and take the line off the tank first.That would be the easiest.But where mine problem was,the vacuum value which is the most comman unfortunatly it was a pain to get at.It was in the wall between the kitchen and the shower.I had to cut a hole in the wall to get at it in my 03.The reason it happens is that there should be a screen where you hook up your hose and the coach don't come with one.
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Old 04-16-2007, 09:04 AM   #5
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I worked on this problem this weekend and found that I had 2 problems.

1. The inlet into the tank was clogged which was causing the problem of not getting water into the tank.

2. The nut that secured the water line to the black tank was cracked which caused the connection to leak. This nut was just glued to the tank so there is no easy way to fix this.

This is what I did to resolve this.

Drilled out the whole stock flush inlet with a 1-3/4" hole saw. Replace this with a tornado flush valve and hooked this into the stock vacuum breaker. I also added a screen to the water inlet to ensure I do not get any debris in the line that would clog the vacuum breaker in the future. I am still waiting for everything to dry but I hope this resolves the problem once and for all.
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