On Tue, 01 Mar 2016 13:17:53 -0500, Micky
wrote:

On Tue, 01 Mar 2016 10:40:35 -0600, wrote:

I have to keep an air compressor inside a heated part of the house,

Electric won't start?? Gas engine inside?? Dangerous.

because it wont start outdoors in cold weather. But I have to run a long
air hose thru the house, then leave my door part way open during cold
weather, in order to pump up a tire. I want to pipe the air thru the
house and bring it outside near where I park vehicles, and put an air
coupler out there.

I've seen a lot of service garages use steel pipe, but that would be
costly and a lot of work to install. PEX would be much cheaper and
easier to install. But can it handle the air pressure? My compressor
shuts off around 100lbs. I would not leave it under pressure, it would
only be turned on when I need to use it.
On 120 volt my compressor would not start cold either. Switching it
to 240 it starts every time.