I recently had to replace the kitchen sink in my 65 Tradewind and decided to cut the copper line where it bends to go vertical up to the faucet and put a 90 degree cut off there and finish out with a flexible supply line instead of the more ridgid copper. Big mistake so far. It seems that back in 1965
airstream used some bastard sized copper line, which I'm sure had some advantage, but at this point I can't find fittings for. It looks like a 1/2 inch line, but is actually larger and 1/2 inch fittings will not slip over it. The only other possibility is that the line got larger over the last 45 years, but I'm not buying that. Does anybody know where I can get a fitting that I can sweat on or use a compression fitting on that will fit this line? The flared end looks to have been slightly reduced to accept a 1/2 inch fitting, but you can't slide it back more than 3/4". I'm stumped and so is the guy at a good sized plumbing store that I went to after trying lowes. Neither store has anything that can help me. The factory sweated a 1/2 inch male fitting and replaced the majority of the plumbing in the rear with pex last year and I have an email and photo in to them, but I was hoping to get it up and running this weekend.