Two lines run from the hvac control unit through the firewall. I see 1/8” hose being sold, but these lines seem smaller than that. Outside diameter is perhaps 1/8, but inside is tiny. Much smaller than windshield fluid line. Anyone know the size? And do I have to buy it from a specialty place instead of my local auto store? I’m assuming it won’t operate as well if I use a larger hose?

 

I have no idea what size those are but being retired out of a Napa know that we sell or sorts of hose.
And some of that stuff is pretty freaking small so.....

 

ok I’ll try Napa. They seem to be the place to go for hoses. All the other stores only go down to 1/8”. Thanks for the reply