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Drainage Problem I have a clogged drainage pipe. How do I unclog it?

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If you have access to an air compressor try blowing the blockage out. Apply air pressure from the outlet as to blow the obstruction up the pipe, not down. If at all possible disconnect the pipe from the air conditioner unit as not to blow debris into the unit. Clean up the mess this will make so it does not wind up back in the pipe. If you do not have access to an air compressor the next best thing would be a garden hose. Follow the same procedure as above. Worst case senario replace the pipe. If you need further assistance with this problem feel free to contact me at geokohler@gmail.com I have yahoo phone out so I can even call you free of charge.
The water pressure from the hose should be more then enough to blast the pipe clear. Just make sure you blow the obstruction from the bottom of the pipe upwards! If you try to force it down it will only jam the obstruction deeper making the problem worse. If it is a flexible pipe you can also remove it from the RV and wiggle it around as you apply water/air pressure. If you use air pressure make sure you use eye protection as debris may fly at dangerous speeds!! Also with air follow with water to was the pipe also. Hope this gets you fixed, If not get back to me with any questions you may have.
Sicerely,
George

Posted on Sep 10, 2008

  • George Kohler
    George Kohler Sep 18, 2008

    Just checking in to see how you made out. Did you manage to get your drain pipe draining again? LOL. If you ever need my assistance in the future feel free to ask,

    George

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Two things can cause the problem you're having. Either separately or collectively.

1. The drain hole in the drip pan near the rear of the unit is clogged.
Sometimes finding the drain hole can be a challenge. As the clog will blend in with the hole. Patience & persistence is what is needed in locating it. A pipe cleaner works well to clear the clog.

2. The rear of the unit does not have enough downward tilt.
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AC DRAINAGE PIPING REQUIREMENT


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2. If you're feeling really lucky, turn the unit OFF and unplug it. Straighten out a wire coat hanger leaving a little hook on one end. Remove the front cover of the AC unit and slide the coat hanger under all the mechanical parts into the drip pan. Sweep it around carefully in the drip pan. all the way to the back of the unit. Be careful not to get the little hooked end caught on anything, by keeping it flat against the drip pan. Doing this, may dislodge any clogs.

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