Boost Gauge Line

I am putting a boost gauge in my uncles motorhome (6.5 turbodiesel)
and we have to run the line from the rear up to the dash

I dont really want to run 27 feet of plastic tubing underneath
the motorhome. I was wondering if we could use the copper line
they use on oil pressure gauges . I dont see why it woudnt work
but then again i have never installed a boost gauge either
Thanks, Tom

Yes the boost doesnt care if its in copper or plastic.

it will be fine.

just remember, the smaller ID of the tube, the more responsive the gauge will be.

Thanks, i figured it would be all right
but a second opinion never hurts