Commercial Services

Backflow Prevention Systems

Backflow prevention is essential for safeguarding our drinking water. In commercial and multi-residential properties, backflow prevention systems stop contaminated water from flowing backward into the mains supply – a vital protection for public health. MPJ Plumbing Group offers professional backflow prevention services across Sydney, ensuring your property’s backflow devices are properly installed, regularly tested, and fully compliant with local regulations. Whether you need a new backflow preventer fitted on your incoming water line or an annual test of existing valves, our accredited plumbers are here to help. We work with all types of backflow prevention devices (such as RPZ valves, double check valves, and vacuum breakers) and ensure they perform flawlessly so you, your occupants, and the wider community can trust the water coming from every tap.

Our Backflow Services

Installation & Replacement

If your property requires a backflow prevention device – common for irrigation systems, fire services, commercial kitchens, and anywhere a potential cross-connection exists – MPJ will supply and install the correct valve. We assess the hazard level (low, medium, high) and choose an appropriate device (e.g., a double check valve for medium hazard or a reduced pressure zone (RPZ) device for high hazard situations). Our installation is done with precision, including adding isolation valves and strainer if needed, and positioning the assembly for easy access for future testing. We also handle replacements when an old device is beyond repair or no longer compliant.
installation replacement
annual testing certification

Annual Testing & Certification

Sydney Water and local councils require testable backflow devices to be certified annually by accredited plumbers. MPJ Plumbing Group’s team includes backflow-accredited specialists who will perform your annual test. We use calibrated equipment to check that the valve is preventing backflow as it should – ensuring the check valves hold pressure and the relief valve (for RPZ) opens at the correct point. After testing, we provide you with a detailed report and a compliance certificate. We can also submit the necessary paperwork to Sydney Water on your behalf, so your records stay up to date.

Maintenance & Repairs

Backflow devices have internal seals and springs that can wear out or get fouled by debris. If our testing uncovers any issue (for example, a valve that’s leaking or not sealing properly), we can often repair it immediately by cleaning the device or replacing parts like rubber seals, seats, or springs. We carry common repair kits for major brands to get things fixed on the spot. Regular maintenance, like cleaning out strainers and exercising valves, is also part of our service to prolong the life of your backflow preventer.

maintenance repairs
site assessment

Site Assessment

Not sure if your building has the required backflow protection? We offer site assessments where we review your plumbing setup and identify any cross-connection hazards. We’ll advise if and where backflow preventers are needed according to regulations (for instance, on your main water meter, on fire services, or on specific equipment like chemical cleaning outlets). This is especially useful for older properties or when undergoing renovations or new compliance checks.

Why Choose MPJ for Backflow Services?

Accredited Professionals

Backflow prevention is a specialised field. Our plumbers are fully accredited in backflow testing and commissioning, which means they have undergone specific training and certification. You can trust our expertise to keep your devices compliant and safe.

Accredited Professionals

Up-to-Date Knowledge

We stay current with Sydney Water requirements and any changes in plumbing codes or Australian Standards relating to backflow. You’ll get correct guidance on compliance – for example, ensuring your backflow device is appropriately registered and that test reports are filed properly each year.

up to date knowledge

All-in-One Convenience

With MPJ, you have a single point of contact for all things backflow. We handle the installation, the annual testing, any repairs, and administrative filings. No need to coordinate between different plumbers or worry about missing a test date – we can put you on a reminder schedule each year.

all in one convenience

Quality Components

We use reputable brands for valves and genuine parts for repairs. This ensures reliability. A quality backflow preventer, properly maintained, can protect your water for many years without issue.

quality components

Protecting Your Business

A backflow incident can be catastrophic – causing contamination that may lead to health department fines, lawsuits, or worse, harm to individuals. By entrusting your backflow prevention to MPJ, you’re taking a responsible step to protect your customers, tenants, and your business’s reputation. We take that responsibility seriously and commit to top-notch service.

protecting your business

Get in Touch

Don’t take chances with water safety – ensure your backflow prevention systems are in place and functioning correctly. Contact MPJ Plumbing Group at (02) 9053 8741 to arrange an installation or schedule your annual backflow testing anywhere in Sydney. Our friendly experts will ensure your property meets all requirements and that your drinking water supply remains clean and secure. With MPJ managing your backflow prevention, compliance is hassle-free and your peace of mind is guaranteed. Call us today or request a free quote for backflow services and keep your water supply protected.