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Old 05-22-2005, 03:36 PM   #1
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stuck dump valve?

Recently the dump (or gate) valve for my black water tank on my 1976 25' Tradewind appears not tobe opening. THe handle moves back and forth, but nothing drains out. The black water tank is full. Does anyone have an idea as to what might be wrong and how to fix it? Thanks.
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Old 05-22-2005, 03:47 PM   #2
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Welcome Andrew!

There could be one of a few things wrong.

The worst would be that the valve blade is jammed in the valve and the pull of the handle to dump pulled the metal handle out of the valve entirely. This is a worst case scenario.

The more likely issue is a matter of the handle disconnecting from the rod that attaches to the valve. In either case you are going to have to get access to the valve assembly to fix it. Look for an access plate on the belly skin, straight in from the pull handle. Airstream uses an extension rod in many cases to get to the valves. This rod is normally connected to the valve with a cotter pin or a rivet. If the connector has broken, it is a simple matter to replace it. The valve could also have a leak around the rod o-ring. This could contribute to rust that will make the valve hard to move. This stiffness can lead to the failure of the connector. Once you have the valve open, inspect the rod for rust. If it is present I would clean with Emery cloth and lube it liberally with silicone spray. Run it in and out quite a few times to get the O ring lubed. This may be all it takes. It may take more.

If the leak is bad you could have to replace the whole assembly. If it is minimal you could use it as is. If the rod will not pull out, twist it in place. It is designed to be twisted. The twisting motion will help break it free of the rust.
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Old 05-22-2005, 04:01 PM   #3
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Quote:
Originally Posted by Andrew Moore
Recently the dump (or gate) valve for my black water tank on my 1976 25' Tradewind appears not tobe opening. THe handle moves back and forth, but nothing drains out. The black water tank is full. Does anyone have an idea as to what might be wrong and how to fix it? Thanks.
Here is a pic of the valve (taken out)
Your rivet may have broken free any you pulled out the extention. That would be the easy fix. If not something gave way inside. You'll need to tkae the screws out and open the case. If that is where the problem is you may want to get a reapir kit...
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