[TowerTalk] Request for Info: Closing off PVC chase with LMR600 cables.

[Al Kozakiewicz]

If you seal the ends there is no convection to replace the air to introduce any additional water vapor. Condensation is a non-issue anyway. There are literally millions of mile of installed conduit in the world and condensation is just not a problem.  Don't believe me - calculate the volume of a pipe and determine ho9w much water there is on that amount of air and assume all of it it saturated and it all condenses out.

100' of 2in conduit contains 0.1177 lbs of water.

Al
AB2ZY

-----Original Message-----
From: TowerTalk [mailto:towertalk-bounces at contesting.com] On Behalf Of W0MU Mike Fatchett
Sent: Tuesday, September 01, 2020 1:15 PM
To: towertalk at contesting.com
Subject: Re: [TowerTalk] Request for Info: Closing off PVC chase with LMR600 cables.

You do not want to seal off these chases from air flow as you can get 
condensation build up inside the chase runs.  I covered mine with screen 
material to keep out the bugs and critters and used a sweep so that the 
chase was not pointing up where water and snow could get in.  If you 
used perforated runs then water should seep out and you could seal it 
with whatever.  Can you put a cap over it with a slot cut out for the 
cables?

W0MU


On 9/1/2020 11:09 AM, Mike & Becca Krzystyniak wrote:
> Greetings to the group.
>
>     I just finished burying and pulling a lot of LMR-600-DB and where that come to ground I pulled them through a chase to protect them from the almighty weed whacker and such. The chase is gray PVC and I wanted to apply a bulk seal the ends to block ingress and accumulation or rain water or smaller critters looking to nest.
>
>     Is there a preferred or safe sealant to close these off with?
>     I assume some kind of caulk would work, but some are silicone based and some of those have acids (so I'm told).
>
>     Any suggestions, guidance, or things not to do-use would be appreciated.
>
> Thanks & 73's  Mike K9MK/5
>
>
>
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