Seattle Fire Suppression System Requirements for Restaurants

Seattle & Washington State Fire Code Requirements

Seattle requires all commercial cooking operations to install and maintain automatic fire suppression systems over cooking equipment, including fryers, griddles, and wok stations. The Seattle Fire Department enforces the Washington State Fire Code (WSFC), which is based on the International Fire Code (IFC) and NFPA 17A standards for kitchen safety. Systems must use Class K wet chemical agents (potassium-based) rather than dry powder or CO2 in cooking areas. The system must be interconnected with the kitchen ventilation hood so that when suppression activates, the exhaust hood and fuel supply shut off simultaneously. All installations require permits from the Seattle Department of Construction and Inspections (DACI) and must be inspected before operation.

Hood System & Ductwork Compliance Standards

Kitchen exhaust hoods in Seattle must meet NFPA 96 standards for grease removal and fire safety, with accessible grease filters or baffle systems that can be cleaned regularly. The entire ductwork from hood to roof must be smooth, sealed, and cleaned by a certified hood cleaning service at minimum every 3 months (more frequently if heavy cooking volume). Seattle requires documented cleanings and records available for Fire Department inspection. All hood systems must have a Class K suppression system nozzle installed directly above the cooking surface. The ductwork cannot have bends or horizontal runs exceeding 10 feet without support, and all seams must be sealed to prevent grease accumulation and fire spread.

Inspection, Testing & Maintenance Schedules

Seattle Fire Department conducts annual inspections of all commercial kitchen fire suppression systems, and inspectors verify that current maintenance tags are affixed to equipment showing certification dates. Licensed fire protection companies must perform annual inspections and hydrostatic testing of the suppression system tanks; these records must be kept on-site for 3 years. Monthly visual inspections by restaurant staff are required, documenting pressure gauges, nozzle condition, and agent levels. Washington State requires training for all kitchen staff on suppression system operation and evacuation procedures. Any system failures, agent discharge (even partial), or damage discovered during inspections must be reported immediately to the Fire Department, and systems must be recharged before the kitchen reopens.

Monitor Seattle health alerts with Panko Alerts. Start your free trial.

Real-time food safety alerts from 25+ government sources. AI-scored by urgency. Less than one bad meal a month — $4.99/mo.