Backflow Testing Lismore
Backflow prevention protects clean water from flowing the wrong way through a plumbing system. For commercial kitchens, workshops, industrial sites, medical rooms, irrigation systems, wash bays and other higher-risk connections, a working backflow prevention device can be the difference between normal operations and a serious water quality issue. At Sidney & Hacking, we provide backflow testing, RPZ valve support, backflow device servicing and practical commercial plumbing advice across Lismore and the Northern Rivers.
Protecting Clean Water Supply
Backflow Testing, Prevention Devices & RPZ Valves
Backflow can happen when pressure changes allow water to reverse direction and pull contaminants back toward the drinking water supply. That is why many commercial and industrial sites rely on backflow prevention devices, RPZ valves and regular testing as part of their plumbing risk management.
We help with backflow prevention device testing, servicing, repairs, replacement advice and installation support as part of broader commercial plumbing and industrial plumbing work. If a device is leaking, due for testing, difficult to access, incorrectly installed, damaged or no longer suited to the site, we can inspect it and explain the next step clearly.
Why Locals Trust Sidney & Hacking
Backflow work needs a plumber who understands the device, the site risk and the plumbing system around it. Here is why Lismore businesses and facility managers call Sidney & Hacking:
Commercial backflow focus
We deal with backflow prevention devices, RPZ valves and the commercial pipework that feeds them.
Testing and servicing support
We help with annual backflow testing, device checks, servicing advice and repair pathways for busy sites.
Qualified and experienced team
Our fully licensed plumbers look at the valve, water supply, isolation points and connected equipment before recommending work.
Advice that makes sense
Expect direct advice on whether the issue needs testing, servicing, replacement, relocation or a broader plumbing fix.
Operational site experience
From kitchens and wash bays to industrial facilities and shared amenities, we work around access, downtime and site safety.
Need a backflow plumber in Lismore who can handle the device and the commercial plumbing around it? That is what this page is for.
Backflow Devices, Testing & Site Plumbing

Backflow Prevention Device Testing
Backflow testing checks whether the prevention device is operating correctly and protecting the water supply as intended. We can inspect the assembly, identify faults, discuss servicing and help plan repairs or replacement when a device is not reliable.

RPZ Valves & Device Repairs
RPZ valves and other backflow prevention devices need the right installation, isolation, access and maintenance. If a valve is leaking, failing checks, difficult to service or no longer suitable, we can advise on practical repair or replacement options.

Commercial Plumbing Maintenance
Backflow prevention belongs inside a planned commercial plumbing maintenance routine. Regular checks help catch leaking valves, access issues, damaged pipework and equipment changes before they become compliance problems or operational disruptions.
Reviews From Lismore And The Northern Rivers
Reviews from local homes, businesses, builders and facilities across Lismore, South Lismore and the Northern Rivers.
Have used Sidney and Hacking for years. Great service from the front office to the trades men. Just had a hot water system replaced. Julian was great, on time, cheerful and did a great job. Would definitely recommended them.
These guys have got me out of trouble on more than one occasion over the yrs. Always happy to help on short notice. Great staff that know what they are doing. Very fair prices. Would not go anywhere else.
Great people to deal with. They have been to my place three times for various issues. Excellent service. Highly recommended
Common Questions About Backflow Prevention
Backflow prevention is a specific commercial plumbing issue, not generic pipework. These are the questions Lismore businesses and site managers usually ask before booking a backflow plumber.
What is a backflow prevention device?
A backflow prevention device helps stop water moving backwards through the plumbing system and contaminating the clean water supply. Depending on the site risk, this may include devices such as RPZ valves or other backflow prevention assemblies used on commercial, industrial and higher-risk water connections.
Who needs backflow testing?
Backflow testing is commonly needed for commercial properties, food premises, industrial sites, workshops, healthcare facilities, irrigation systems and sites with equipment connected to the water supply. We can inspect the device and advise on servicing, repair or replacement as part of your plumbing services.
Can you repair or replace backflow prevention devices?
Yes. We can help with backflow prevention device servicing, repairs, replacement advice, RPZ valve support and related commercial plumbing work. Feel free to give us a call if you need a backflow plumber in Lismore or the Northern Rivers and want clear advice before arranging work.
Need Backflow Testing Or Prevention Device Help?
If your backflow prevention device needs testing, servicing, repair advice or replacement support, Sidney & Hacking can help. Book local backflow plumber support for your Lismore commercial site, industrial facility, food premises, workshop, irrigation connection or shared amenities before a water protection issue becomes a bigger problem.