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Old 12-09-2015, 06:32 PM   #1
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Help! Extending PVC pipes the shortest way possible


Hello and thanks to all.

Long story short.. Remodel going from siding to stucco..The net is anything sticking out of the house is shorter due to stucco being thicker than siding.

Have some 3" PVC vents that had a weatherproof/bug proof covers on them.. With the siding I had a 1/2 inch or so sticking out of house ..

With the thicker Stucco it is now flush with the house and no room for the covers to slide over as they covers attach to the oustide wall

I need to lengthen them as short as possible so the covers slide over and the covers are still somewhat close to the house.


Do they make a fitting that..

On one end would go over a 3" pipe and on the other end would be the exact same outter dimensions of a 3 inch pipe ? I can not find it if they do.


it would almost be like if you wanted to glue 2 3" pipes together but instead of a coupling one end of the pipes was flared ...

or a coupling that goes inside the pipes instead of on the outside....

Again, thanks to all.

Last edited by beachfront71; 12-09-2015 at 06:51 PM.
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Old 12-09-2015, 08:34 PM   #2
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At one time my drapery hardware supplier had some special 'inside couplings' for PVC pipe (they slid inside the pipe to maintain a uniform outside). I don't recall whether there was a 3" version or not.

They do: rowleycompany.com/products/PVC-Splice.asp

Looks like they have discontinued the line but still have some stock
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Old 12-10-2015, 01:06 PM   #3
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The only thing i know of is a street fitting.
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Old 12-10-2015, 03:35 PM   #4
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Cut it back inside the house and use a coupling to add the extension.
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Old 12-10-2015, 05:02 PM   #5
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Well Beach, I just happen to be in town today and stopped by my plumbing supply for a cup of coffee and lots of BS. But prior to having to pull my britches legs up to avoid the deep BS I ask about your dilemma.

To my surprise the answer was quick with no BS. According to my supplier either of these closet ( toilet ) flange pipes of the correct size can be cut to the desired length, slipped into your pipe(s) to make a glued internal coupling for an extension.

Whether it meets any code I have no idea and that's no BS.
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Old 12-10-2015, 05:07 PM   #6
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Yea a 3 inch insert flange....
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Old 12-10-2015, 07:22 PM   #7
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Thanks to all.

I found the part.

For those who care google pipe extender..one side slides into existing pipe, the other side is same ODimension as existing pipe.

Spears happens to make them
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