In my case, it was relatively easy.
I used 4 inch pipe and I installed everything at one "go". No grease.
The reason? I managed to install the cables at the same time the pipe was
laid. I managed to get a relatively expensive "digger" so we could safely
enter the hole and move the wire past the occasional snag.
Since I decided to have holes for condensation, and the cable was bury
rated anyway, I didn't feel the need to glue anything, but I could have
glued the pipe after we ran the cable anyway.
I decided, for better or worse, not to even attempt to service it, so I put
in more coax than required and more control cable as well. It's all still
new, so we'll see what the future brings, but I don't foresee problems. I
don't have to worry about any sort of grease sitting in that pipe for the
next several decades. I suppose I will have the odd bug and maybe even a
lizard or two, but I'm not terribly worried about it.
The redundancy wasn't all that much extra money outside of the coax and 4
inch PVC is cheap and mine was designed to be buried.
Larry Wo0Z
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