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  #1  
Old 11-28-2017
djlcanuck djlcanuck is offline
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Join Date: Aug 2016
Location: Coleville
Posts: 206
Question Hole in the AC

Ok I have pulled my front AC unit to replace the 14x14 gasket.
What I found has me confused (not that that's unusual).
At the front of the AC pan there are 2 holes one in each corner for draining condensation. The holes had 1 1/2 inch high gaskets glued (silicone) to the outside and to corresponding hole in the roof of the BB. after peeling up the metal roof a little I can see drain pipes leading to the front corner of the BB. I haven't blown them out with air or looked for the drain end at front of the coach. I have never heard of internal drains in an RV. I have hunted and hunted to find replacement gaskets with no luck.
Should I :
a: Make something out of plex (etc.)
b: Seal up the holes in the roof and let the AC drain on to the roof like every other RV out there
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Coleville, SK
96 WB42
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  #2  
Old 11-28-2017
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max hendrix max hendrix is offline
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Location: Weatherford
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No No No No No. Please don’t dump it out on the roof. I think you will regret it very quickly. My BMC had an internal drainage system and I bet it is just like the one on yours. Worked well and I never had any trouble with it.

My new SOB has the Cheap *** “drain it on the roof” system and it is terrible. My
Windshields are stained from where the water drains over the edge onto them and over the years it has etched the glass. The paint doesn’t show any wear but I’m really surprised.
The drainage has also etched my concrete in my shop under the bus. Just putting a bucket under the tubes would be easy to prevent that. The drainage water must have some chemical quality that is somewhat corrosive to stain my concrete and windshields.

I have already bought new AC gaskets and the flat cups to mount under the AC units to build a drainage piping system. I got the cups from Tweety’s or somewhere on eBay. They are OE on Airstream trailers to keep the drainage from staining all that polished aluminum. Not cheap but I wanted something that will work well. I don’t think I can get the piping down the inside of the wall but will try to build some kind of drain system before warmer weather.



Max
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96 BMC 40' Sold
2008 HaulMark Super C S&S
Freightliner Chassis w/ 515hp S60 & 12sp Ultrashift

Last edited by max hendrix; 11-28-2017 at 10:26 PM. Reason: More info
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  #3  
Old 11-28-2017
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Mallie Lennon Mallie Lennon is offline
1995 WB 42’ Series 60
 
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Location: Eufaula
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Should drain in front of the left front wheel.
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Eufaula, Oklahoma
95 42' Wanderlodge
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  #4  
Old 11-28-2017
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Randy Dupree Randy Dupree is offline
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I call those rubber things "donuts".
Heres what i do,the rubber donuts shrink with time,i cut a 1.5 plastic pipe,PVC,to replace the donuts.
Mount the AC unit back in place,cut the PVC slightly longer than the gap,pickup on the corner of the unit and slip the PVC in place.
The ac unit will hold it in place,make sure the PVC fits over the bulkhead connector in the roof.

I have been doing this for years,when the rubber donuts shrink the wind when driving will blow condensate water back into the coach,normally on the bed.
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Port St Joe Fl.
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  #5  
Old 11-29-2017
djlcanuck djlcanuck is offline
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Quote:
Originally Posted by Randy Dupree View Post
I call those rubber things "donuts".
Heres what i do,the rubber donuts shrink with time,i cut a 1.5 plastic pipe,PVC,to replace the donuts.
Mount the AC unit back in place,cut the PVC slightly longer than the gap,pickup on the corner of the unit and slip the PVC in place.
The ac unit will hold it in place,make sure the PVC fits over the bulkhead connector in the roof.

I have been doing this for years,when the rubber donuts shrink the wind when driving will blow condensate water back into the coach,normally on the bed.
Do you "Silicone" them to the roof and the AC unit for a good seal?
I'm not planning to use silicone. I have a settled on an industrial type of di-core called Secoflex 1A
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96 WB42
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Old 11-29-2017
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Randy Dupree Randy Dupree is offline
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nope,i cut them long enough that they seal pretty good.
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2000 LXI 43
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Port St Joe Fl.
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  #7  
Old 11-29-2017
djlcanuck djlcanuck is offline
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Quote:
Originally Posted by Randy Dupree View Post
nope,i cut them long enough that they seal pretty good.
Ok I went and picked up a piece of 1 1/2" PVC this morning.
Do happen to remember how long the piece has to be?
It'll save me from lifting the AC in and out 5 time to get the measurement right.
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96 WB42
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  #8  
Old 11-29-2017
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Randy Dupree Randy Dupree is offline
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Quote:
Originally Posted by djlcanuck View Post
Ok I went and picked up a piece of 1 1/2" PVC this morning.
Do happen to remember how long the piece has to be?
It'll save me from lifting the AC in and out 5 time to get the measurement right.
read post 4
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2000 LXI 43
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Port St Joe Fl.
www.buybyebluebird.com

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  #9  
Old 11-29-2017
djlcanuck djlcanuck is offline
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Quote:
Originally Posted by Randy Dupree View Post
read post 4
Are you saying the length is 1.5"?
I thought that was the diameter.
It just happened to fit over the hexagon end sticking out of the roof.
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96 WB42
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  #10  
Old 11-29-2017
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Randy Dupree Randy Dupree is offline
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I bolt the ac unit down,then i measure the gap,then cut the pipe maybe 1/4 longer,then pickup the corner of the ac unit (yes,it will come up) and slide the pipe into place.
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