• The sprinkler is just a plug that holds back water in a pipe similar to your other plumbing pipes.

• Heat (not smoke) from a fire will break a glass tube or melt a solder plug which releases the water.

• The water comes out as a spray that covers the area immediately around the sprinkler, putting out the fire.

• Only the one sprinkler closest to the fire opens. All the other sprinklers remain sealed so the water is confined to just the area of the fire. 90% of fires are stopped with just one sprinkler.