Looking for reliable backflow testing, filing support, repairs, or replacements in Nassau County? 123 Backflow Testing helps property owners, managers, plumbers, and facilities teams keep annual backflow compliance simple. ✅ Our Services Include: Annual backflow testing Fireline testing Filing support Failed-device follow-up and retesting Backflow repairs Replacements and installations Multi-property and bulk service support ⚙️ Why Choose 123 Backflow? Trusted by major clients including the NYC Department of Education, JFK, LaGuardia, AKAM, and Cintas Clear scheduling and professional follow-through Organized service records through Field Pie Flat, transparent pricing Volume pricing available for multiple buildings or devices 📍 Service Area: Nassau County, with service available throughout Long Island, New York City, Westchester, all of New Jersey, and nearby areas. 💲 Standard Testing: $75 per standard annual test in Nassau County. Repairs, replacements, installations, and failed-device follow-up are quoted separately. Send an inquiry today and we’ll help confirm the best next step for your property.