EST. 1979
A-1 PEPPERWORTH
State Certified Backflow Portal

Lake Whatcom Reservoir Protection
WAC 246-290-490 Compliance Engine

Official certified tester on the Lake Whatcom Water and Sewer District (LWWSD) roster protecting drinking water for 100,000+ Whatcom County residents.

Hydraulic Simulation Engine

WAC 246-290-490 Backflow Assembly Hydraulics

Simulate pressure differentials across Double Check Valve Assemblies (DCVA) & RPBA.

Municipal Supply Pressure
65 PSI
Downstream Property Pressure
45 PSI
Lake Whatcom Mains
POTABLE
CHECK VALVES OPEN
💧 100% SECURE FLOW
Facility / Commercial
CLIENT
Normal Hydraulics: Municipal supply pressure (65 PSI) exceeds downstream pressure (45 PSI). Water flows forward smoothly into client facility.

Lake Whatcom Backflow Compliance Assessor

WAC 246-290-490 & LWWSD Mandatory Annual Inspection Status

Mandatory Annual Inspection Overdue

Under WAC 246-290-490 and Lake Whatcom Water and Sewer District mandates, your property requires an annual inspection of its Reduced Pressure Backflow Assembly (RPBA).

State Certified Backflow License ID: #1PEPPPP791RZ
Schedule LWWSD Certified Backflow Test

Mandatory WAC 246-290-490 Requirements

Washington State Cross-Connection Control Mandates

Reduced Pressure Backflow Assembly (RPBA)

Required for high-hazard commercial facilities, chemical feed loops, hydronic heating systems, and commercial kitchens. Features twin check valves with an intermediate differential relief valve to vent non-potable fluids to atmosphere upon pressure failure.

Double Check Valve Assembly (DCVA)

Mandatory for low-hazard multi-family residential cross-connections and fire sprinkler mains. Maintains two independently acting spring-loaded check valves preventing backpressure and backsiphonage.

Schedule Annual LWWSD Backflow Certification

Avoid water service shutoff notices. Our state-certified backflow technicians conduct calibration and submit official test reports directly to municipal water purveyors.

Submit Backflow Test Request