Firstly, I am not qualified plumber, which my firends know but they still ask for advice. So here is how it went:
my friend: hey I have a humidifier question
me: what’s wrong?
my friend: i think my humidifier is not working. how do I troubleshoot?
…
[35 min of back and forth messages later]
…
me: looks like supply pipe is clogged at the compression valve. so disconnect the supply pipe from the humidifier
me: but…
my friend: hang on. I’m disconnecting it
me: my battery is low
me: you need to shut the water off first?
me: battery light red. damn!
my friend: what light? there is water running from the disconnected pipe..
my friend: you still there?
me: losing radio soon
me: flush your toilets
my friend: where do I shut it off? I don’t have to go. wtf?
Anyways, you don’t want this to happen to you. Please call a licenced plumber.