CA/NV AWWA certified backflow testing, repair, and reporting in San Marcos, San Diego County. Same-week appointments. Reports filed with Vallecitos Water District.
San Marcos is a fast-growing North County inland city with major new residential and commercial developments. Properties throughout San Marcos (zip codes 92069, 92078) are required by California law to have their backflow prevention assemblies tested annually by a certified tester.
SD Coastal Backflow is a CA/NV AWWA Certified Backflow Prevention Assembly Tester (Cert. No. 20975) serving San Marcos and all of San Diego County. We test all assembly types — PVB, DC, and RP — including detector assemblies, and file test reports with Vallecitos Water District within 24 hours.
State-mandated annual certification testing for all backflow prevention assemblies. Every test includes same-day report filing with Vallecitos Water District. Learn more about our testing service →
Failed assembly? We diagnose and repair on-site — most repairs completed same visit. Coastal Crew members save 20% on all repair labor. Learn more about repairs →
Managing a community in San Marcos? We offer volume pricing, coordinated scheduling, and consolidated compliance reporting for HOAs and property management companies. View our HOA program →
We're a San Diego-based, locally operated backflow prevention specialist — not a franchise or call center. When you book a test in San Marcos, a CA/NV AWWA certified technician shows up with calibrated equipment, performs the test, and files the report with Vallecitos Water District. Transparent pricing, no surprises, no subcontractors.
Standard ¾″–3″ assemblies. Reports filed with Vallecitos Water District.
Phone/Text: (619) 353-8378
Email: info@sdbackflow.com
Hours: Mon–Sat, same-week appointments