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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 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.

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,



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Our window air unit is leaking into the house. It was purchased it earlier this summer and has worked fine until now. We don't see a drainage hole on the outside and the manual said nothing about a...

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.
The general rule of thumb for rear downward tilt is 1/4' to 1/2". This allows the water to flow to the rear of the drain pan and thru the drain hole. Rather than into the house.

Hope this helps you & thanks for choosing FixYa..

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My ac unit is now after 3 weeks of use dripping water inwards(even with a 1/4" slope of the unit to the outside) is my drip pan overflowing?

Yes, your drip pan is overflowing, because the drain hole near the back of the unit is clogged. There are 2 ways to address this problem.

1. Look out side the house, under the unit and search carefully for the drain hole or drain tube. If it's a hole, clear it using something like a pipe leaner. It it's a tube, use 2 pipe cleaners twisted horizontally together and carefully run it up into the tubing in a push/pull motion. This will help dislodge any clogs.

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.

And finally, if you're in a high humidity area, increasing the tilt to 1/2" may help improve the drainage.

Hope this helps you unclog the problem.

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Drainage problem-water is coming out of the air vent inspite of the drainage pipe

The drain pipe may have come loose or it is clogged. I bet on it being clogged. They are not difficult to unclog, using something like a flexible Zip Tie about 18" - 20" long and small enough to fit into the drain tubing. It will help to **** out the clog.

Hope this helped you solve the problem.

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Water is dripping from the inside unit and not coming out of the drainage pipe outside

The reason the water is coming out of the unit and not the drainage pipe outside is for a few possible reasons.
1 -the drain pipe is clogged / plugged (due to calcium build up,or frozen)
2- the line is kinked or blocked.
check the drain pipe carefully, there may be obstuctions.

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1 Answer

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The problem is caused by fine particulants such as dust, pet dander, etc. which mix with the collected condinsation water and forms a grey gel eventually clogging up the drainage pipe. The solution is to attach a wet vaccuum hose to the discharge end of the drainage pipe and vaccuum out the gel. It is advisable to flush the system by adding water to the a/c's drain pan while the vaccuum is still running.

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Sometimes the drainage tube will get clogged..

The drainage tube on the inside should be clear so you can see if its clogged & not flowing..

Is the water flowing to the end point of the drainage ?

They should be cleaned out once a year by using a shop vac from the outside.. The after that - disconceting and running bleach water through it from the inside.. This avoids cloggs that will definately happen..

Hope this helps !!
Please rate me good ;o)

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Yes, there should be a place for the condensate to drain outside. It's apparently clogged and the drip pan is overfilling. Look for a tube or an opening outside where the condensate should be exiting. This needs to be unclogged.

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Daikin air conditioner leakin water at a fast rate

You should have access to the condensate drain from the outside. You can use compressed air to unclog the unit. If you can, try accessing the drain from the source outward but be careful, you can blow debris everywhere. Make sure you have something to catch it so it doesn't spray everywhere. If you don't have access to compressed air, you can use a small plumbing snake to work you way up the pipe. Hope this answers your question.

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