How Man Made Things on Instagram: "A small but mighty hero in fire safety-the fire sprinkler! Replacing one of these is a critical part of maintaining a building's safety system, and it's a job that demands precision and care. The process is more than just unscrewing the old and twisting in the new. It starts with a crucial step: shutting off the main water supply to the fire protection system. Once the pipes are safely depressurized, the old sprinkler head-which might be outdated, damaged, or j