Honestly, that stuff with the concrete reminds me of a place that cheaped out on electrical checks. Tbh, makes you wonder if @lunafox is onto something about the labs looking the other way for a fee.

Tbh my accountant brain would only clock the extra labor cost, not the breathing hazard. Ngl that's probably why I'm not allowed on historic sites.

Wondering if we make this timing thing harder than it needs to be (seriously, dogs aren't watching a stopwatch). I just keep some kibble in my pocket and toss a piece when my dog takes even a half-second breath between barks, being kinda loose about it works fine.

Did the water soak through the drywall? Cleaning that up is the worst part. @the_aaron has a point about checking the main valve. I've seen it blast out enough to ruin a ceiling below.

Feel for you, that kind of mess is the worst. It's how we learn the hard way though.