Oakland CA

Backflow Prevention

Protecting your building’s water supply is critical—and backflow prevention plays a key role in keeping it safe and compliant. In Oakland, where commercial and multi-unit residential buildings rely on consistent water quality, Hetherington Mechanical & Plumbing provides expert backflow prevention services you can count on. We install, test, certify, and maintain backflow prevention assemblies to meet both city and state requirements. Whether you’re due for an annual certification or need a new system installed, our experienced technicians ensure your potable water stays protected from contamination and your property stays in compliance.

Annual Testing & Certification

Oakland requires annual testing and certification of backflow prevention assemblies. We handle the entire process—testing, documentation, and submission—so your property stays fully compliant with local regulations.

Backflow Assembly Installation & Replacement

Whether you're installing a new system or replacing an outdated device, we provide professional backflow prevention assembly installation tailored to your building’s plumbing configuration and water use needs.

Protection Against Contamination

Our services help safeguard your potable water supply from potential contamination caused by reverse flow—crucial for maintaining safe, drinkable water in residential, commercial, and mixed-use buildings.

Emergency Troubleshooting & Repairs

If a backflow device fails or leaks, our technicians respond quickly to diagnose and resolve the issue, preventing water service interruptions or safety hazards for your property.

Trusted by Property Managers & HOAs

We work closely with property management companies, HOAs, and building owners across Oakland, offering reliable scheduling, accurate reporting, and honest guidance to ensure every system stays safe and up to code.

More Services

Backflow prevention is just one part of the comprehensive plumbing and mechanical services we offer throughout Oakland and the Bay Area. At Hetherington Mechanical & Plumbing, we’re equipped to handle everything from boiler maintenance and domestic hot water system installation to hydronic and steam heating, leak detection, sewer cleaning, and potable water booster pump systems. We also specialize in safe water system shutdowns and preventative maintenance programs designed to keep your building’s systems running smoothly and efficiently. If you’re looking for a dependable partner for full-service plumbing and mechanical support, visit our Services page to explore everything we offer.