#1 · SEATTLE
Grease trap and interceptor service — pumping, cleaning, and compliance records — keeps restaurant drains flowing and health inspectors satisfied. Skipped pumpings show up as mainline backups at the worst possible hour.
Wet-side market range — get itemized quotes before work starts
Companies whose focus matches this work are listed first, then Seattle's other top-rated plumbers. Same no-pay-to-play ranking as everywhere on Wetside Plumbing — the formula.
Google Business data, 2026-08-07. See the full Seattle ranking →
Also searched as: grease trap cleaning, grease trap interceptor, grease trap interceptor cleaning.
Most jurisdictions use the 25% rule: pump when grease and solids reach a quarter of capacity. For a busy kitchen that's typically monthly to quarterly. Keep the manifests — inspectors ask.
Small under-sink units are traps; large in-ground vaults are interceptors. Same job, different scale — and different service equipment, so confirm the company handles your type.
Ask for their Washington L&I contractor number and verify it at secure.lni.wa.gov/verify — active license, bond, and insurance. Listings above with a green badge are ones we've already matched to an active license in state records.