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Commercial plumbing · Backflow prevention
Commercial Backflow Prevention Sydney
Need help with commercial backflow prevention? EKORP services Sydney's south. Call to discuss the property, the work and current availability.
Where’s the job?
Commercial backflow prevention is a legal obligation, not an optional extra. Requirements can vary by property and authority. We will help you confirm what applies before work begins.
If you manage a building, a strata scheme or a portfolio of sites, backflow is really a scheduling and documentation problem. We run the testing calendar with advance notice so certificates never lapse, supply submission-ready reports within 48 hours of each test, and maintain a device register across every property you look after, so compliance reads as one summary view instead of a stack of certificates.
What Sydney Water requires from your property
Sydney Water classifies commercial premises by contamination hazard, and the classification decides everything: which device type is mandatory, how often it is tested, and what your cross-connection control notice demands. Hospitals, aged-care facilities, laboratories, chemical processors and any site with a fire system tie-in sit at high hazard and must run RPZD devices. Commercial kitchens, restaurants and laundries sit at medium hazard, where DCDA and DCVA assemblies suit. Standard offices and retail still need protection at the water service entry.
Getting the classification right matters in both directions. Under-specify and you risk a failed inspection or disconnection; over-specify and you pay for a device class your site never needed. We conduct formal hazard assessments for new clients and revisit the classification whenever operations change, and our test reports and compliance certificates meet the requirements insurers now ask for.
- High hazard: healthcare, aged care, labs, chemical processing, fire tie-ins. RPZD mandatory
- Medium hazard: commercial kitchens, restaurants, laundries. DCDA and DCVA assemblies
- Low hazard: offices and retail, protected without over-specification
- Mixed-use and strata: protection points mapped, responsibility documented
RPZD, DCVA or air gap: matching the device to the risk
Device selection depends on your hazard classification, water pressure, pipe size and access constraints. Requirements can vary by property and authority. We will help you confirm what applies before work begins.
Placement is as important as selection. Requirements can vary by property and authority. We will help you confirm what applies before work begins.
- RPZ devices for high-hazard medical, fire and chemical sites
- DCVA and DCDA assemblies for medium-hazard commercial
- Pressure vacuum breakers for irrigation and hose connections
- Air gap systems where no physical connection is needed
- Parallel systems for facilities that cannot accept interruption
Annual testing, certificates and compliance tracking
Annual testing by a Sydney Water-recognised certifier is a legal obligation for most commercial backflow preventers in NSW. Requirements can vary by property and authority. We will help you confirm what applies before work begins. Every test produces a formal, submission-ready report covering device details, results and any remedial work, supplied within 48 hours, and a failed device is flagged on the spot with a written scope for the fix.
For facilities managers with devices across multiple properties, we maintain a compliance register and manage the schedule with advance notice so no certificate lapses. Batch testing is available for multi-site clients and large device counts, with fixed-rate annual contracts and multi-site invoicing.
Installed around your operations, not through them
A compliant installation starts before anyone picks up a tool: a site assessment to confirm water entry, hazard classification and the optimal device location, a design drawing for complex installs, and coordination with Sydney Water and council handled through one point of contact. Most installations take one or two business days.
The typical planned water interruption is between one and four hours, and facilities that cannot accept a daytime outage can book after-hours or weekend work. Where no interruption is acceptable at any stage, a parallel device installation keeps one side of the system live while work is done on the other. Emergency arrival times depend on location, traffic and plumber availability. We will give you an estimated arrival window when you call.
Costs, contracts and where we work
Installation costs vary with the device class your hazard tier requires, pipe diameter, access, and whether drainage, enclosures or authority approvals are needed. RPZD devices cost more than DCVA or DCDA assemblies, which is why an accurate hazard assessment is the single best cost control. We inspect the job and confirm the price before work begins.
EKORP Plumbing is based at Bayside Plaza, Brighton-Le-Sands NSW 2216 and services Sydney's south. Call 02 8667 5354 to confirm availability for your site.
Call us to explain what is happening. We will confirm availability and any callout charge before booking.
Call 02 8667 5354Contact us →What to expect
What to expect from our commercial backflow prevention service.
We inspect the problem, explain the options and confirm the price before work begins.
We check the plumbing and identify what is causing the issue before recommending work.
You get a clear explanation of the available repairs and what each option involves.
We provide the price before work begins and speak with you before changing the agreed scope.
“From booking to completion, everything ran smoothly. The work was carried out efficiently, problems were identified and handled on the spot, and the end result was exactly what we hoped for. Clean finish, clear communication, and fair pricing. Wouldn’t hesitate to use again.”
“Emilio was prompt and professional. He quickly assessed the issue with our hot water system and had Nik come and fix it in no time. We highly recommend for anyone needing any plumbing assistance!”
“EKORP stepped in immediately with no fuss. Within less than an hour, they’d contacted my real estate agent and had a plumber (Nick) show up at my door. What could have been very stressful was made smooth and easy.”
“Quick response and turn around. Completed the job as per description and left the area tidy.”
“We had some water pressure issues. The young fellow who came around was polite, courteous and knew exactly what we needed and proceeded to fix the problem with no fuss at all.”
“If we need a plumber we call Emilio! Friendly and polite plumbers. Good work done ASAP, usually with a follow up call.”
“Great communication, fast service and Emilio was lovely to deal with and got the job done. Thanks guys!”
“The EKORP plumbing team are highly professional and prompt in their communications. … Polite, friendly service, answered questions appropriately.”
Questions
Common questions about commercial backflow prevention.
Here are clear answers to common questions. Call us if you need help with something else.
How often does a backflow device need testing in NSW?
Sydney Water requires high and medium hazard containment devices to be tested when they are installed and every year afterwards. The accredited plumber must lodge the result with Sydney Water within two days of the test. Low hazard connections generally use non-testable devices and have no annual test.
Who is responsible for backflow testing in a strata building?
The containment device sits on the property's connection to the Sydney Water main, which is almost always common property, so the owners corporation is normally responsible for testing it. Individual lot owners are not usually billed directly. Check the strata plan and the Common Property Memorandum if the boundary is disputed.
What are the different types of backflow prevention devices and which one do I need?
The main types are Reduced Pressure Zone Devices (RPZD), Double Check Valve Assemblies (DCVA or DCV), Pressure Vacuum Breakers (PVB), Atmospheric Vacuum Breakers (AVB) and Dual Check Valves. The right device depends on the hazard rating of your connection. High-hazard connections such as chemical systems require an RPZD. Medium-hazard connections such as irrigation systems on commercial properties typically require a DCV. Low-hazard connections may be served by a dual check valve or vacuum breaker. Our plumbers assess the hazard level on site and specify the correct device class.
Can I perform my own backflow testing or does it require a licensed professional?
Backflow testing in NSW must be carried out by a licensed plumber who holds a specific backflow prevention endorsement. DIY testing is not accepted for compliance purposes, and test reports submitted by anyone other than an endorsed will not be recognised by Sydney Water or local councils. This requirement exists because backflow testing involves precise pressure measurement, and an incorrectly conducted test can produce a result that appears compliant when the device is failing.
What happens if my backflow device fails testing?
If your device fails testing, it must be repaired or replaced before it can be certified as compliant. In most cases we carry the parts needed to repair common device faults on the spot, so the repair happens the same day as the test. If the device is beyond repair, we remove it and install a replacement, then conduct an immediate post-installation test to certify the new device. You receive an updated compliance certificate once the repaired or replaced device passes. We notify you of the outcome and the required action before we do anything, so you are never charged for work you have not approved.
How much does backflow testing cost in Sydney?
Backflow testing cost in Sydney is charged per device, not per property, so a site with four devices costs roughly four times a site with one. The test itself takes about 20 to 30 minutes per device. Repairs, replacement parts and a re-test are billed separately if the device fails.
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