On Mon, 10 Oct 2016 15:30:58 -0400, Tekkie®
wrote:

Hi all, I want to run a coax into to my house bedroom because I'm disabled.
I recall reading having a short piece of electrical pipe placed through the
wall and sealed after the coax is run. Any other ideas? How much of a tail
should brought into the room?

Anything works if you live in a moderate climate.
Temperatures below freezing point can make problems.
We often have to replace cables which are warm inside
and freezing outside due to water condensate.
The air inside can diffuse through the cable
and cables must prevent air circulation inside by foam filling
and airtight sealed N connectors.
Avoid the use of PL239 by all means, the shielded banana plug
belongs into the thrash bin.
"UHF connector" really means: Unsuited for High Frequencies.
https://en.wikipedia.org/wiki/UHF_connector

w.