Smoke detector lag time?

Yeah . . . much more expensive if you have well water . . . typically you need to buy a couple of pressurized tanks which quickly adds up vs. doing the system off city water.

Ah . . . the old fire grenades. Is this one empty or is it filled with salt water? Typically I see these with a red or green filled liquid which is typically carbon tetracholride -- which can be quite nasty to the nervous system -- not to mention that it can convert to phosgene gas when it comes in contact with high heat.

Nicely done! Salt water. My grandfather was one of the good ole boys at station #1 for most of his life in Madison, WI. He and my grandmother had some neat artifacts from various stations that were upgraded.

I just thought of something else. Look for an interconnected alarm that is latching. That means that the detector that caused the trip has a light that blinks at a faster than usual rate. That helps to troubleshoot.