Located just north of Washington DC, together, Castle Sprinkler and Alarm, Inc. and ACE Fire Extinguisher, Inc. specialize in a full range of fire protection services. Since opening our doors in 1941 we have evolved into one of the most reputable and trusted fire protection companies serving the Northern Virginia, Washington DC, and Maryland areas. We attribute our success to our unsurpassed commitment to always being, “Your Friend in Fire Protection”. While operating under the same family ownership, ACE Fire Extinguisher and Castle Sprinkler and Alarm are guided by two principles: 1. Meeting the best interests of our customers 2. Operating through fire code compliance.