If you have a really big pipe, you use a ball of lightweight foam or a
bread bag blown up to loosely fit the pipe and tied off.
73!
 -Adam
  WJ4X
On 10/24/2011 5:10 PM, Wilson Lamb wrote:
> Professionals use cheap plastic pull twine and blow it through with 
> compressd air.  No doubt a cap with a hole for the twine and a hole for air 
> is used by some, but I've seen them just use their hand and an airgun.  I 
> think a wad of paper is the usual puller.
> 
> Those who know can chime in now.
> 
> Wilson
> W4BOH 
> 
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