I didn't do a very thorough job of draining water lines when I left. First split was in a dead-end copper pipe and I was able to cut that shorter and cap it with a compression fitting (very cool device.) Second was in a thread from a faucet, which broke off when I tried to turn it, so now I own a new faucet and a nipple extractor. Third is in what I think is the cold water pipe going to the sink.
But here is where it gets weird- it only leaks
when I open the faucet. When the water to the system is on, but the cold tap is off, no leak. (And "leak" is an understatement- it sprays out with the tap on.
I don't get why it isn't leaking all the time. It's a big open split. I think I can get another magic compression repair thingy to fix it, so that isn't the issue, but why isn't it just on?
This cabin is slated to be demolished within the next six months but it seems to want to self-destruct ahead of schedule.