Fire sprinklers are a huge part of any building. Making sure that they are working well and that they are in good order is a must. Fire sprinkler contractors are a great resource when it comes to learning how these vital systems work, and when learning how they can save your home or building. A sprinkler is made of a few different parts. Video Source A threaded end connects it to the water line and a sealed valve helps to hold the water back. The valve is held in place with a glass tube that contains a liquid that expands…