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We Stand Out for Three Things
Honesty. Communication . Quality
We built this business on these simple values - doing what’s right, keeping our clients informed, and delivering work we’re proud of. These principles have guided us since day one and continue to define who we are today. Here's it all started
Sergio Villegas & Alondra Haro | Founders 4th of July Backflow Testing LLC
Our Story
4th of July Backflow, LLC isn’t just a business - it’s something my wife Alondra and I built together back in 2016 with one goal: to keep our community’s water safe while giving every customer the kind of care we’d want for our own family.
With a background in landscaping and a degree in Environmental and Occupational Health, I’ve always been passionate about safety and the environment. After earning my AWWA Certification and becoming a Cross-Connection Control Specialist, I decided to focus full-time on backflow testing, repairs, installations, and cross-connection surveys - bringing together my technical skills, genuine care for people and love for what I do.
Backflow services can sound complicated, but I make it my job to keep things simple, honest, and reliable. Whether I’m testing, repairing, or doing cross-connection surveys, I make sure every job is done right - no shortcuts, no guesswork.
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Alondra brings the heart to our business. She makes sure every customer feels heard, understood, and supported. Together, we’ve built a family-run company where professionalism, communication, and quality care go hand in hand.
When you contact us with your backflow needs, you’re not just hiring a contractor - you’re trusting a family that truly cares about your safety and peace of mind.
Our Mission
To protect our community’s water by providing reliable backflow testing, repair, and installation services - done with honesty, precision, and care. Our goal is to make the process simple and stress-free, giving every customer confidence and peace of mind.
Our Vision
To be a trusted name in backflow services across California - known not just for technical expertise, but for genuine care, family values, and a lasting commitment to keeping every home and business safe.
Putting Our Mission into Action
We believe that protecting our community’s water goes beyond our daily work. That’s why we proudly donate our time and services to help keep local water systems safe - one small act at a time.
