When using air to blow out the lines my furthest water source is our outside kitchen. Is it best to just open the cold side and get all the water out then close and move to the next closest and open ...
I'd suggest to remove as much water as possible by opening drains and sink valves, toilet, shower, etc. before hooking up the air compressor. There is a lot of energy in even a small slug of water in a pipe with air behind it. That slug of water moving through connections at high speed from the air compressed behind it isn't good for the plumbing.
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