If your Sims have a knack for starting fires, then they should invest in this industrial-strength safety device to fireproof any home or community building. The moment this sprinkler detects extreme heat in its vicinity, a shower of flame-quenching water rains down and immediately extinguishes the threat. However, beware of pranksters sporting a lighter, since this sprinkler does not discriminate when it comes to fire prevention.
Fire sprinklers were first introduced in The Sims 2: University, as the Skimmer Securities Ceiling Sprinkler. They cost §245, and are found in the Misc. > Misc. section of buy mode.
Sprinklers must be placed indoors. A sprinkler covers a 5x5 area, centered on the sprinkler. Any fire that starts under the sprinkler or within two squares of it will immediately be extinguished, but the sprinkler will leave a watery mess that must be mopped up. Nearby Sims will react to the sprinkler by running around with their hands over their heads until it stops operating. If the player cancels this action, it will be pushed back on the Sim.
Sims can pull a prank by taking out a lighter and putting it under a sprinkler, causing it to go off. On college lots, an evil mascot may do this autonomously.
Fire sprinklers return in The Sims 4, in the from of a utility panel. They cost §750, and are found in the Electronics section of build mode.
While the utility panel of the sprinklers is the main object that is bought from build mode, the actual sprinklers themselves do exist, but are only visible when a fire is occurring. Utility panels can be placed both inside and outside, but the sprinklers require a ceiling to work. When a fire has started, all utility panels on the lot will deploy a single sprinkler on the ceiling above the fire, even if the panel is in a different room. The sprinkler will then put out the fire without leaving any puddles.