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Old 06-24-2014, 12:51 PM   #1
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2014 MADP Roof Drain Plugged...

i noticed that water is gushing over my roof gutter on the front passenger side and cascading down the outside of the door and door awning assembly.

checked the roof drain plastic screen...completely free of debris. standing water 1.5" deep up top...

can't find the drain under the coach on front pass side. anyone know why it would be plugged and how you go about flushing or fishing it out?

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Old 06-24-2014, 01:10 PM   #2
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Unless you had special lines run from bottom corners of the AC drip pan the AC water from condensation will drain through a hole in corners of pan onto the roof and along the roof line gutter system. If you do have drain lines than need to remove screen and fish a wire or fish through the plastic tubing and brake the blockage.
You need to feel with finger the corner's of pan for hole and clear the hole in it of any debris.
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Old 06-24-2014, 03:36 PM   #3
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Zak, last time I was at Newmar the service writer and I were up on the roof and he explained how the A/C drain was plumbed. Each A/C has a drain pan and a tube that feeds to the back of the coach and then down inside the engine compartment. As long as the drain pans/tube aren't clogged than just make sure the front of the coach is up a little higher than the back. If you're dead level the water will just overflow the drain.
Charlie, Jackie
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Old 06-24-2014, 07:16 PM   #4
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Thanks Charlie, 10-4!
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Old 06-24-2014, 10:57 PM   #5
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Zak - I also own a 2014 MADP Model 4364. These new models have roof drains at all 4 corners of the roof with plastic slit grates on them . The best way to clear them is to shoot compressed air backwards up through them . Look for the black duck bill shaped end attached to a white poly pipe inside your rear & front caps- they are generally lower than anything else. Reduce your compressed air pressure to 20 psi, stick the end of your compressed air blow gun in the duck bill, wrap with a rag & give it a blast of air. If you hear it blowing through you have sucessfully cleared it. If not, increase the psi 5# at a time. not to exceed 60 psi. After you clear the line, get on roof & clear the debry so it won't re-clog the drains again. The AC drains are plumbed into these 4 corner drains. Newmar did this on the newer models to drain the roof because of the raised facia.
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Old 06-24-2014, 11:20 PM   #6
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I also have a 2014 MADP Model 4361. I didn't notice any slits for drains in the roof when I was up there inspecting it about a week ago. I do know the Duck Bill hoses you are referring to. I'll have to get back on the roof and see if I missed the drains. Water is "standing" on the roof.

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Old 06-25-2014, 08:02 PM   #7
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I frequently get debris blocking the grates....not sure e where it coms from since I'm not under a tree. but there may be some construction debris inside the poly downspouts which need cleaning. Also, I plan on replacing the screens with some domed mesh screens to help keep water flowing even if debris might be collecting.
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Old 06-25-2014, 08:27 PM   #8
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Great ideas...thanks all!

Careful around the drain screens....I noted on my coach that they are sealed with some kind of putty cement and it's real soft!
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Old 07-31-2014, 06:17 AM   #9
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We use clothespins clipped to each corner spout so that the water from each corner doesn't run down the side of the MH as much.
Curt & Susan 2009 38' Newmar Grand Star 3752
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Old 07-31-2014, 09:00 AM   #10
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On our '13 Essex that also has corner drains, I get an accumulation of algae that grows in the depression along each side of the MH. I just completed a major roof cleaning that included the entire drain system. I'm even considering waxing the drain depression, front to back, to improve water flow and and reduce algae growth.

However, the openings where the water falls down the drains will be a constant source of maintenance as they are small and prone to clogging.
Dan Leininger
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Old 08-01-2014, 04:55 PM   #11
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Let me know what you come up with.
Dr Donny
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Old 08-02-2014, 08:23 PM   #12
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You can also sometimes unclog the drain by sliding a nozzle up the duckbill, clamp it with your hand and then turn on the water. You'll get wet but it may work. I've also climbed up on the roof and held a nozzle on the roof drain. Good luck. They plug up often.
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