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Old 03-03-2012, 08:55 PM   #1
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Sealing Conduit


How would I seal the top of the pvc conduit so no water gets in. It is 1/2" and has speaker wire coming out of the top for a speaker on a 2x4.

The conduit faces straight up. What would I use? It is standard 14ga speaker wire if that even makes a difference.

Links are helpful.

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Old 03-03-2012, 09:06 PM   #2
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Sealing Conduit


Glue an outdoor box on top and put something like this on the front,


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Old 03-03-2012, 09:17 PM   #3
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Sealing Conduit


Being just speaker wire, I'd seal it with silicone or duct seal, if you don't mind the look. Does the bottom of the conduit go into the house?
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Old 03-03-2012, 09:47 PM   #4
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Sealing Conduit


I would put a couple of ninety's on to form a U. Then, still seal it with silicone or duct seal to keep insects out
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Old 03-03-2012, 09:57 PM   #5
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Sealing Conduit


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I would put a couple of ninety's on to form a U. Then, still seal it with silicone or duct seal to keep insects out
That would put the opening of the conduit about a foot away from where the speaker is. I would install a proper outlet box with plate to keep the water from getting in and stuff the box full of insulation so nothing will go in there.
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Old 03-03-2012, 10:00 PM   #6
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Sealing Conduit


The box seems like a good idea. I think I would just put a cap on it, drill the cap or the pipe from the side and silicone the wire in place......but that's just me.......
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Old 03-03-2012, 10:10 PM   #7
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The box seems like a good idea. I think I would just put a cap on it, drill the cap or the pipe from the side and silicone the wire in place......but that's just me.......
That would work too and keep stuff from getting in the pipe.
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Old 03-04-2012, 09:32 AM   #8
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Sealing Conduit


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Being just speaker wire, I'd seal it with silicone or duct seal, if you don't mind the look. Does the bottom of the conduit go into the house?
Yes the conduit goes into the house, but the conduit runs about 25-30ft buried, then it goes up about a foot and into the corner of a crawlspace vent (the 1/2" conduit slid perfectly into the vent whole) with silicone around it to prevent jumbo bugs from coming through.


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The box seems like a good idea. I think I would just put a cap on it, drill the cap or the pipe from the side and silicone the wire in place......but that's just me.......
I might do that, or get a PVC 1 gang box, and put a weatherproof cover on it with a small hole drilled for the wire, and silicone it. This way spare wire is inside the box incase the wire ever needs to be cut back and fixed or replaced (animals chewed it, oxidized, new speaker, etc)

Thanks all!
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Old 03-04-2012, 09:33 AM   #9
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Sealing Conduit


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Glue an outdoor box on top and put something like this on the front,

Doesn't look like it would prevent water from entering in driving rains and wind. But thanks anyway.....
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Old 03-04-2012, 11:51 AM   #10
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Sealing Conduit


Buried conduit will get wet no matter how you seal it. I hope your wire is rated for wet location.
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Old 03-04-2012, 12:31 PM   #11
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Sealing Conduit


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Doesn't look like it would prevent water from entering in driving rains and wind. But thanks anyway.....
Any water that manages to blow in that opening and up almost two inches would be very minimal and just stay in the insulation stuffed in there and evaporate.

And like rjniles said the wire should be rated for wet loacations and should probably also be sunlight resistant unless you plan on replacing it often.
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Old 03-04-2012, 02:17 PM   #12
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Sealing Conduit


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Any water that manages to blow in that opening and up almost two inches would be very minimal and just stay in the insulation stuffed in there and evaporate.

And like rjniles said the wire should be rated for wet loacations and should probably also be sunlight resistant unless you plan on replacing it often.

I'm using the same wire I used 10 years ago outside. Its basic clear speaker wire for indoor use. It held up being directly buried for 10+ yrs. until an animal chewed on it. Same stuff I'm using in the conduit I just buried last week. The conduit is just going to keep animals from chewing on it, and keep it out of the sun/weather.
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Old 03-04-2012, 07:41 PM   #13
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Sealing Conduit


Would this also work too? "Duct Seal"

It seems this is what electricians use, and I also so this at the top of a utility pole with the wires coming out of conduit.

It just seems to me a big PVC box would be "ugly" and annoying up on the top of the post near the speaker. At least I can paint this stuff and have it not "stick out" like a sore thumb.

http://www.homedepot.com/h_d1/N-5yc1...1&keyword=duct seal&storeId=10051
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Old 03-04-2012, 08:16 PM   #14
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Sealing Conduit


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Would this also work too? "Duct Seal"


It just seems to me a big PVC box would be "ugly

http://www.homedepot.com/h_d1/N-5yc1...1&keyword=duct seal&storeId=10051
Not nearly as ugly as duct seal....
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Old 03-04-2012, 08:58 PM   #15
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Sealing Conduit


how about gluing on a service head? The ones for 1/2 and 3/4 PVC aren't that big.


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