A Pye-Barker Fire & Safety Company, Keystone offers a full range of fire protection services and life safety solutions including fire sprinkler inspection, fire alarm testing, fire extinguisher maintenance, and fire suppression system installation. We service Pennsylvania, New Jersey and Delaware. Whether we're designing, testing or servicing your fire protection system, we make the process easy. We recognize that understanding... Read More about Pye-Barker Fire & Safety, formerly Keystone Fire and Security