One of the most important items to have in your home is a fire extinguisher. But fire extinguishers require maintenance to remain in working condition. Metal extinguishers have a gauge to determine if the pressure is in the proper operating range: If the needle is pointing to green, the unit is fine; if it's pointing to red, the unit is overcharged or needs to be recharged. The good news is that many fire departments have refill programs that will fix your extinguishers for a small fee. It costs significantly less than buying a new one, and the fire department will also recharge and inspect your extinguisher. If your local fire department does not offer the service, it should be able to recommend a company nearby that can do it for you.