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Old 06-02-2016, 02:11 PM   #1
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Fresh water drain

FW tank was 25%, opened plastic drain behind tires. Took 24 hours to drain; I could only get a really slow trickle. Any ideas why draining so slow?
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Old 06-02-2016, 02:15 PM   #2
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Are you sure you had the drain all the way open?

I've drained ours a few times now, and while it was slow, it wasn't that slow.
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Old 06-02-2016, 02:19 PM   #3
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First guess would be some debris across the opening in the tank. You should be able to remove the drain cock and check it out. I would not just blow what ever is there back into the tank as it will reappear in time.
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Old 06-02-2016, 02:54 PM   #4
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I agree with the idea of debris/sludge/slime in the tank and it's blocking the drain.

I've seen the drain valves attached in one of two ways and there may be other methods too.

1) Valve is threaded and can simply be tightened and loosened (installed and removed) by rotating the body clockwise and counter-clockwise.

2) Valve is attached to some sort of plastic hose using a hose clamp. If you're drain is like ours it has two screws attaching it to the sheet metal pan surrounding the tank. After removing those screws the drain valve can be pulled out to access the hose clamp.

After removing the valve you can perform a series of fill and flush and may want to add some bleach to help remove the residue that may have accumulated in the tank.
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Old 06-02-2016, 03:02 PM   #5
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Quote:
Originally Posted by DeltaRon View Post
FW tank was 25%, opened plastic drain behind tires. Took 24 hours to drain; I could only get a really slow trickle. Any ideas why draining so slow?
Could you give us an idea of how old your AS is, and your previous use of the fresh water tank drain? With a new-ish trailer [2015], it is unlikely IMO that you have any build-up of organic sludge, unless something like leaves etc. got in when you filled the tank previously.

Some debris from construction might be blocking your drain, just inside the tank? Is this the first time you have had this problem, or perhaps the first time you have used the tank and drain?

Earlier threads discuss the drain, for instance:

http://www.airforums.com/forums/f443...in-151072.html

and ROBERT CROSS has shown a replacement option in metal in Post #5 therein.

Removal of the plastic drain may be a little dicey IMO, as access to the hose clamp is tight apparently, and there is very little play in the length of the tubing to the actual tank.

I would consider holding a compressed air nozzle over the discharge, held loosely by hand, and blowing air back up the drain, to see if the rate of discharge temporarily increases. You might be able to push possible debris away from the back of the drain.

Good luck.

Peter

PS -- Ditto to earlier comment about drain possibly not being open all the way. Ours needs to be turned 180 and point to the rear of the trailer, to be fully open.

PS2 -- The following sub-forum's list of topics includes other previous threads on point:

http://www.airforums.com/forums/f443/
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Old 06-02-2016, 03:22 PM   #6
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Run a pipe cleaner up it
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Old 06-02-2016, 04:02 PM   #7
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Run a pipe cleaner up it
That is not a good idea as the drain is a right angle and even if you could you are only pushing the problem back into the tank to reoccur later.
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Old 06-02-2016, 04:29 PM   #8
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I dunno. It worked for me...I think "the problem" broke up and flowed out.
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Old 06-09-2016, 05:24 PM   #9
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Originally Posted by DeltaRon View Post
FW tank was 25%, opened plastic drain behind tires. Took 24 hours to drain; I could only get a really slow trickle. Any ideas why draining so slow?
Wondering if you got this straightened out?

Thanks,

Peter
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