Seattle & King County, WA Certified Backflow Testing & Grease Trap (FOG) Directory
Compare 5 verified local providers approved for Seattle Public Utilities (SPU) — Cross-Connection Control & Backflow Prevention Program (SPU SAMS Cross-Connection Tester Portal (NJBSoft)) and Seattle Public Utilities (SPU) Fats, Oils & Grease (FOG) Program & King County Industrial Waste (KCIW) commercial grease interceptor pump-out manifests (follow the schedule on your utility notice or permit).
$55–$80
Fair Residential Backflow Test
$200–$1000
Commercial FOG Pump-Out
5 Verified
Utility-Listed Local Pros
Seattle & King County Fast Compliance DeskSame-Day Filing
24/7 Emergency Backup & Scheduled Pumping per Your Utility Notice
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Seattle & King County Consumer & Compliance Alert (Verified 2026-10-27)
SPU $105-PER-ASSEMBLY REMINDER CHARGE & SHUTOFF RISK: Seattle Public Utilities charges $105 per backflow preventer for each reminder letter once 30 days pass without a passing test on file, plus $155 for a late-test shutoff notice, and may terminate water service. SPU charges $0 for SAMS portal submissions — independent DOH-certified BATs in Seattle advertise residential tests from about $55–$80 with no reporting fee.
FREE · NO CREDIT CARD
Free Backflow Test & Grease Trap Due-Date Reminder in Seattle & King County
Tell us when your last backflow test or grease trap pump-out was and how often it’s required. We’ll email you a confirmation now, then a reminder about 30 days and again about 7 days before the next one is due (for pump-outs every 45 days or less, just the 7-day reminder) — so you don’t get hit with a late notice, fine, or water shutoff.
✓ You’re on the free reminder list.
Your free reminder is saved. Check your inbox for a confirmation email with your next due date. We’ll email you again about 30 days and 7 days before it’s due.
Every installed backflow assembly must be tested annually by a Washington State DOH-certified Backflow Assembly Tester (BAT), and again after any repair or replacement; new assemblies must be tested before being put into service. SPU mails test-due notices, and proof of a passing test is expected within 30 days of the original notice. The tester submits the report directly to SPU — since August 17, 2026, all test reports must be entered electronically in SPU's SAMS Tester Portal (the SPU_TestReports email inbox is no longer accepted), using the Letter Code from the customer's notice or the exact assembly serial number on file.
Non-Compliance Penalty
$105 per backflow preventer for each reminder letter when proof of a passing test is not received within 30 days of the original notice, a $155 late assembly test shutoff notice charge, and possible termination of water service.
Utility Contact
(206) 684-3536 (SPU Cross-Connection Control & Backflow Prevention Program, [email protected]) • Seattle Municipal Tower, 700 5th Avenue, Suite 4900, Seattle, WA 98104 (Mailing: PO Box 34018, Seattle, WA 98124-5177)
RESTAURANT & COMMERCIAL KITCHEN FOG
Seattle Public Utilities (SPU) Fats, Oils & Grease (FOG) Program & King County Industrial Waste (KCIW) Rules
Any Seattle business with commercial kitchen plumbing fixtures and a King County Food Business Permit must install and maintain a grease interceptor (SMC 21.16.310 A) — including delis, coffee and ice cream shops, pizzerias, and caterers. Interceptors must be cleaned per the manufacturer's specifications and whenever they are more than 25% full of grease and food waste (SMC 21.16.310 B); SPU guidance says every facility must have its interceptor professionally cleaned at least once per year, and gravity interceptors may only be cleaned by a professional. Emulsifiers, enzymes, and bio-additives are prohibited (SMC 21.16.310 D), and discharges above 100 ppm FOG are prohibited (SMC 21.16.300).
Manifest & Hauler Rule
SPU provides a FOG Pretreatment Device Maintenance Log for food service establishments to record every interceptor cleaning (date, who cleaned it, and what was removed); keep the log and hauler service receipts on site for SPU and King County inspectors. King County may require some polar-FOG dischargers to prepare a written FOG Control Plan.
Violation Fines
Seattle Municipal Code penalties for FOG non-compliance range from $250 to $5,000, plus recovery of any City costs from grease-related damage to the sanitary sewer; King County Industrial Waste enforces its 100 mg/L nonpolar FOG limit and free-floating polar FOG rules.
Environmental Desk
(206) 684-3000 / [email protected] (Seattle Public Utilities); (206) 477-5371 (King County Wastewater Treatment Division Industrial Waste Section)
Verified Certified Testers & Permitted FOG Haulers in Seattle & King County
Filter by residential availability, 24/7 emergency response, or direct electronic utility portal filing.
Showing all 5 verified providers
★ Featured Verified Pro spot open in Seattle & King County. Certified backflow testers and permitted grease trap haulers can claim the highlighted top placement on this page.
23+ year Puget Sound backflow specialist completing 15,000+ tests a year for homes, HOAs, businesses, and municipalities across King, Snohomish, and Pierce Counties, submitting reports directly to the water provider.
Certified backflow tester serving Seattle and the south King County corridor for both residential and commercial assemblies, filing reports with the water provider, emailing customers a copy the same day, and offering a free annual test reminder service.
Credentials: WA DOH-Certified Backflow Assembly Tester (Cert. #B5596) • L&I-Certified Backflow Plumber; City of Seattle Business License #777789Area / Address: Serving Seattle, West Seattle, Burien, Des Moines, SeaTac & Tukwila (Mailing: 10624 Irene Ave SW, Lakewood, WA 98499)Source:Official website (backflowtestingseattle.com, Rates page) & WCS Hire-a-BAT program ↗
Published rates $65–$80 (ball-valve assemblies 2" and under); test reports sent to the water provider and emailed to you same day
Seattle plumbing contractor since 1968 at 8820 Aurora Ave N offering backflow testing, inspection, installation, and repair for homes and businesses, plus commercial grease interceptor installation and side sewer services listed by SPU.
Auburn pumping company listed by Seattle Public Utilities for installing and maintaining both large and small grease interceptors, and a King County certified liquid waste hauler with a 24-hour service line.
Restaurant services provider with a Seattle (98108) operation listed by SPU for grease interceptor maintenance, offering commercial grease trap cleaning and installation plus used cooking oil collection and recycling, with Spanish-speaking support.
Seattle & King County, WA Required Replacement Parts, Freeze Protection & Under-Sink Grease Traps
Failed an annual inspection or preparing for winter freeze warnings? Order code-approved ASSE backflow rebuild kits, insulated enclosures, and PDI-certified commercial grease traps before your re-test.
Complete first/second check & differential relief valve rubber repair kits (O-rings, discs, springs, and diaphragm) to pass a failed annual test without replacing the entire brass body.
Compatible with 3/4"–2" Watts 009/LF009 & Wilkins 975XL/975XL2/375
Code-compliant indoor hydromechanical grease interceptor (HGI) for cafes, delis, coffee shops, and small commercial kitchens with flow-control fitting and removable baffles.
Seattle & King County, WA Backflow & Grease Trap Cost Estimator
Check what your job should actually cost in Seattle & King County before accepting an inflated quote—and compare against municipal non-compliance penalties.
Seattle & King County Fair-Price Benchmark
$55 – $80
Includes electronic submission to SPU SAMS Cross-Connection Tester Portal (NJBSoft).
Overpriced Quote Alert: Commercial fire/plumbing firms in Seattle & King County frequently quote $150+ for single-valve visits. City non-compliance penalty/shutoff exposure starts at $105+.
LOCAL CONTRACTOR PARTNER & LEAD ROUTING PROGRAM
Are You a Certified Backflow Tester or Permitted FOG Hauler?
Lock in high-intent homeowner backflow tests, commercial RPZ certifications, and recurring restaurant grease interceptor contracts in Seattle & King County, WA with zero middleman lead-broker markup.
TIER 1 • FEATURED VERIFIED PRO CARD
Featured Verified Pro Slot (Seattle & King County, WA)
$79 / month • cancel anytime
✓ Highlighted Featured Pro Card with an official “Verified Pro” ribbon matched to your services (backflow testing or grease trap / FOG hauling)
✓ Direct Click-to-Call & Website Link with zero per-lead fee
✓ Portal filing badge for WA backflow testers who file directly with the utility
Exclusive City Quote-Form Routing + #1 Pinned Pro Bundle
$149 / month • 1 exclusive pro per city
★ Everything in Tier 1 (#1 Pinned Top Placement) on the Seattle & King County, WA compliance guide
★ Exclusive Quote-Form Lead Forwarding: every homeowner & commercial quote request submitted on the Seattle & King County, WA page is forwarded to your email inbox
★ Locks Out Competing Sponsors for exclusive quote-form routing in your city
Seattle & King County, WA Backflow & Grease Trap FAQs
Direct answers sourced from Seattle Public Utilities (SPU) — Cross-Connection Control & Backflow Prevention Program and Seattle Public Utilities (SPU) Fats, Oils & Grease (FOG) Program & King County Industrial Waste (KCIW) regulations.
Who has to test backflow assemblies in Seattle, and what happens if I miss the deadline?
Seattle Public Utilities (SPU) requires every installed backflow assembly to be tested annually by a Washington State DOH-certified Backflow Assembly Tester (BAT), and after any repair or replacement. If proof of a passing test isn't received within 30 days of SPU's original notice, SPU's Customer Charges (FIN-220.1) add $105 per backflow preventer for each reminder letter and $155 for a late assembly test shutoff notice, and SPU may terminate water service. Questions go to [email protected] or (206) 684-3536.
How are backflow test reports submitted to Seattle Public Utilities in 2026?
Since August 17, 2026, SPU only accepts test reports entered electronically in its SAMS Cross-Connection Tester Portal (NJBSoft); the old SPU_TestReports email inbox is closed. Your tester submits the report directly to SPU using the Letter Code from your notice or the exact assembly serial number, and must have a current BAT certification and test kit calibration on file. SPU charges nothing to submit reports, so you should not pay a separate 'filing fee.'
What are the grease interceptor (FOG) rules for Seattle restaurants?
Under SMC 21.16.310, any business with commercial kitchen plumbing fixtures and a King County Food Business Permit must install and maintain a grease interceptor and clean it per the manufacturer's specifications and whenever it is more than 25% full of grease and food waste. Emulsifiers, enzymes, and bio-additives are banned, and SPU says every interceptor must be professionally cleaned at least once a year. Non-compliance penalties range from $250 to $5,000, plus the City's sewer damage costs. King County Industrial Waste separately limits nonpolar FOG to 100 mg/L.
FREE · NO CREDIT CARD
Free Backflow Test & Grease Trap Due-Date Reminder in Seattle & King County
Tell us when your last backflow test or grease trap pump-out was and how often it’s required. We’ll email you a confirmation now, then a reminder about 30 days and again about 7 days before the next one is due (for pump-outs every 45 days or less, just the 7-day reminder) — so you don’t get hit with a late notice, fine, or water shutoff.
✓ You’re on the free reminder list.
Your free reminder is saved. Check your inbox for a confirmation email with your next due date. We’ll email you again about 30 days and 7 days before it’s due.
Tell us what you need. Your request goes to FlowComply Directory and, in cities with an exclusive featured pro, straight to that certified tester or permitted hauler too, so they can quote you. You’ll get a follow-up by phone or email.
Need it fast? Call one of the providers listed on this page directly. Their phone numbers are on each listing.