compliance
Seattle Grease Trap Requirements & Maintenance Guide
Seattle restaurants must maintain compliant grease traps under strict local codes enforced by the Department of Construction & Inspections (DOCI) and Public Health. Improper maintenance leads to costly violations, sewage backups, and operational shutdowns. Understanding Seattle's specific grease interceptor rules protects your business and the city's wastewater system.
Seattle's Grease Trap Regulations & Local Standards
Seattle requires all food service establishments with grease-producing operations to install and maintain grease interceptors compliant with Seattle Plumbing Code (Chapter 27.44, Seattle Municipal Code). The Department of Construction & Inspections enforces sizing based on peak flow rates and meal preparation volume—typically 50-gallon minimum for small operations, larger for high-volume establishments. Grease traps must be regularly pumped, typically every 30–60 days depending on usage, and owners must maintain pumping records. Non-compliance results in fines up to $1,000+ per violation and potential permit suspension.
Inspection & Enforcement by Seattle Health Department
The Seattle Public Health Department includes grease trap condition in routine health inspections, checking for proper installation, capacity, maintenance records, and physical deterioration. Inspectors verify that interceptors are accessible, properly vented, and functioning without leaks or overflow. Failed grease trap inspections are documented as critical violations if they create an immediate public health or environmental hazard. Regular violations may trigger increased inspection frequency and enforcement action under Seattle's public health regulations.
Best Practices for Seattle Compliance & Maintenance
Schedule routine pumping on a fixed calendar—do not wait until trap is full. Work with a licensed Seattle-area grease trap pumping service familiar with local regulations. Train staff to minimize grease disposal into drains by pre-scraping dishware and using drain strainers. Keep detailed maintenance logs with dates, contractor name, and volumes removed—inspectors will request these records. Test traps seasonally for leaks and structural integrity, and upgrade undersized systems proactively to avoid violations during peak service periods.
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