I'm surprised to hear checking water levels are part of any FAs preflight check. We did that decades ago on planes no longer flying.

Even when I was still flying, that practiced had stopped. A planes comes in, it is serviced on turn around and goes back out. Yes we could check water levels on the main panel, but ground staff would come on and do the checking.

I guess you learn something new everyday.

Fly Safe!

NWA FA