[TowerTalk] sealing conduit

[Gregg Seidl]

I'm wondering how other seal conduit runs out to the towers.
    I installed 4 inch non-perforated drain tile to both my towers.MUCH MUCH 
cheaper then pvc conduit.I want to seal the ends up in a way to keep 
critters out.I'm not too worried about water because I believe it is 
impossible to keep water out no matter what you do.I use cables cables that 
are direct burial..I also want to allow it to "breathe".I thought of used 
that foam stuff that you can use to seal up cracks around your windows and 
such.Then I'd drill a small 3/16 maybe hole behind  the plug to allow it to 
breathe.Plus this way when I get a stupid idea to install another antenna 
all I need to do is get the stuff out which is easy.
    I'm always open to other ideas.  Gregg K9KL