For putting out sims, I much prefer using steam traps specifically set up for that purpose. They take up less space than a dive well, and can be made to look more technological. I had tried to use them to extinguish cooking fires, but once the fire starts the traditional switches can't be operated. I'm actually a little surprised that sprinklers can be operated after a fire starts.
But now that I think about it, turning on a sprinkler doesn't require your sim to physically interact with it...much like lights. And for my burglary prevention system, I activated it using a wall light set to accept triggers. I wanted to make a way to activate the system regardless of the sim's mood, because sims won't operate switches when they're really tired. Manipulating switches also require time.
This means that I may possibly be able to make my fire prevention system work the same way.