[TowerTalk] Drain Pipe Passing Thru Tower Foundation

[n0tt1 at juno.com]

On Wed, 15 Jan 2014 10:31:48 -0600 "Patrick Greenlee"
<patrick_g at windstream.net> writes:
> I am currently getting ready to pull a few 3/4 inch drip tubing runs 
> through 
> some 4 inch pvc used as conduit. This is to carry some cables, coax, 
> etc.

Partick,

That's the smartest thing you could have done.  Not necessarily
just for the water problem, but because you'll have no problems
running any new cables later on.  Number those drip tubes. 

Without the smaller tubing, new cables can easily intertwine 
with the existing cables in the 4" pipe, making installation difficult.

Water in the pipe will evaporate fairly quickly if there is
a vented Tee (or equivalent) placed at each end of the run.
The Tee is bug-screened and placed so that rain water will not enter.
The "running" part of the Tee can be blocked with removable
foam to keep air out of the shack, box or whatever and yet allow
cables to pass.

73,
Charlie, N0TT