I agree with Bill, minimum 3", plus leave a couple of string pulls in the
pipe just to make it easier the next time you need to add a cable.
If you do get water that will not drain just use a Vacuum cleaner in reverse
to blow the water out, works well.
I don't use drainage holes, but then I am in California and never have water
in the pipe. If I did it again I would make some holes at the low point
just in case, just never thought of it at the time.
Mike, K6BR
-----Original Message-----
1. Don't even THINK of using anything less than 3" PVC (or whatever
material) and 4"" is better. Three coax runs will look very lonely in a
3" or 4" pipe, but you will be happy you used a larger pipe when the day
comes to pull more cable through it. It costs little to do it now and will
save considerable frustration later.
2. Spend some time determining where the low point(s) are and provide holes
and drainage area under these points. No matter what you do, water will be
present in the pipe; some from condensation.
I had to dig up a run of 2" PVC and redo it (with 4" and better drainage)
not long ago. I had standing water in the pipe and could not change cables
in the old conduit.
Bill - W2WO
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