Sydney Wide · Licensed · Accredited
Annual Backflow Testing Sydney
Received a reminder letter from Sydney Water? Apex Plumbing Services handles annual backflow testing across Sydney we inspect your device, complete the certified test, lodge the report and keep your property compliant. Fixed quotes. 26+ years on the tools.
26+
Years On The Tools
122+
5-Star Reviews
24/7
Sydney Support
Due Soon?
Book Your Annual Test
If Sydney Water has sent a reminder, your testing window is open. Apex will quote, test, repair (if needed) and lodge, all in one visit where possible.
- Accredited backflow plumbers
- Test report lodged with Sydney Water
- Fixed quote before work starts
- Workmanship guarantee
306733C
NSW Licence
26+
Years Experience
122+
5-Star Reviews
24/7
Availability
$0
Quote Cost
The Service Explained
What Is Annual Backflow Testing?
Annual backflow testing is the yearly performance check of a testable backflow prevention device that protects Sydney’s drinking water supply from cross-contamination. The test confirms the device’s check valves, seals, springs and (where fitted) relief valve still hold pressure and shut off correctly under reverse flow conditions.
In NSW, annual backflow prevention testing is required under the Plumbing Code of Australia and the AS/NZS 3500.1 plumbing standard. The maximum interval between tests is 12 months. Only a backflow-accredited, licensed plumber can perform the test and lodge a valid test report with Sydney Water.
Apex Plumbing Services helps Sydney homeowners, strata managers and commercial property owners stay on top of annual backflow testing without the back-and-forth we book, test, lodge the report and remind you when the next test is due.
Need a fresh install, a repair, or a broader conversation about device types and hazard ratings? Visit our main backflow prevention service page for installation, inspection and compliance support.
Who Needs This Test?
Sydney properties with a medium or high hazard rating connected to Sydney Water's mains must have testable containment devices tested every 12 months. This commonly applies to commercial buildings, strata complexes, irrigation-fed properties, medical and dental premises, hospitality venues, mechanical workshops and fire services.
What You Get
An accredited on-site test, a valid Sydney Water test report lodged on your behalf, a written copy for your records, fixed pricing before work starts, and a reminder before your next annual due date.
Sydney Water Compliance
Why Annual Backflow Testing Is Required In Sydney
Sydney Water maintains a register of every testable backflow device installed across the network and tracks whether each one is tested on time. Missing a test or skipping the report lodgement is what triggers reminders, fees and escalating notices.
The Legal Framework
Backflow prevention in NSW is governed by the Plumbing Code of Australia and AS/NZS 3500.1, with backflow-specific test requirements under AS/NZS 2845.3. These set the standards your device must meet and the procedures your plumber must follow. Test equipment must be calibrated annually for the test results to be valid.
Why It Matters
Backflow devices stop contaminated water chemicals, irrigation runoff, stagnant fire system water, commercial waste from siphoning back into the public drinking water supply when pressure drops. The annual test confirms it still does its job under load.
Sydney Water's Role
Sydney Water issues an annual reminder for each registered testable device, audits lodged reports and maintains the official register of accredited backflow plumbers. The property owner not the tenant, not the strata manager unless they've taken it on is legally responsible for arranging the test and ensuring the report is submitted.
For official guidance straight from the authority, see Sydney Water’s backflow prevention information page and the NSW Government’s cross-connection and backflow control guidance.
Owner Responsibility
Receiving a Sydney Water reminder is helpful but not a legal trigger. The 12-month testing obligation applies whether you receive a letter or not. Apex tracks your due date in our system and contacts you ahead of it.
Identifying your valve
The tempering valve cap colour tells you what system it's matched to
If you’re looking at your hot water system and trying to work out what valve is fitted, the cap colour on top of the valve is the quickest tell. Apex always matches the replacement to the system type using the wrong cap on the wrong system is the most common DIY mistake.
| Property / Connection Type | Likely Hazard Rating | Annual Test Required? |
|---|---|---|
| Standard residential home, no irrigation, no tank top-up | Low | Usually non-testable device only – no annual test |
| Residential with rainwater tank connected to mains | Low to Medium | Annual test where a testable device is fitted |
| Commercial office or retail with combined services | Medium | Yes – annual test of containment device |
| Restaurants, cafes, commercial kitchens | Medium to High | Yes – every 12 months |
| Medical, dental, veterinary premises | High | Yes – every 12 months |
| Mechanical workshops, industrial sites | High | Yes – every 12 months |
| Fire service connection (hydrant / sprinkler) | Medium | Yes – testable double check detector assembly required |
| Strata building with shared metered supply | Medium | Yes – testable containment device, annual test |
| Irrigation with chemical or fertiliser injection | High | Yes – RPZ or air gap, annual test |
Don’t adjust or swap a tempering valve yourself. Even between residential models, the springs and thermal elements are tuned for different inlet conditions, and a mismatched valve will either fail early or fail to hold the safe outlet temperature.
Device Coverage
Testable Backflow Devices We Service Each Year
Annual backflow prevention testing covers different testable devices depending on hazard rating and connection type. Apex tests all common units used across Sydney properties.
High Hazard
Reduced Pressure Zone Device (RPZ)
The highest mechanical protection level. Contains two check valves with a relief valve between them. Annual test verifies all three components hold and discharge correctly under pressure. Common on commercial, industrial and high-risk irrigation connections.
Medium Hazard
Testable Double Check Valve Assembly
The standard double check valve backflow preventer for medium-hazard sites many commercial buildings, irrigation systems and fire services use a testable double check valve. Annual testing checks each valve seats correctly and holds pressure.
Fire Services
Double Check Detector Assembly (DCDA)
Used on fire hydrant and sprinkler services to provide backflow protection while detecting unauthorised water use. Tested annually like other testable devices.
Medium Hazard
Pressure Vacuum Breaker (PVB)
Common on irrigation systems without injection. Annual test confirms the air inlet and check valve still function so backsiphonage protection remains in place.
Client review: Confirm the full list of testable devices Apex commonly services on Sydney sites. If you have specific manufacturer brands you test most often (Watts, Wilkins, Apollo, Febco, etc.), we can list them here for better keyword reach and credibility.
From Booking To Lodgement
How Apex Handles Your Annual Backflow Test
A clear five-step process from the day you call to the day Sydney Water receives the lodged report. Most standard tests are completed in a single site visit.
Quote & Schedule
On-Site Inspection
Certified Test
Report Prepared
Lodged & Logged
From Booking To Lodgement
How Apex Handles Your Annual Backflow Test
Sydney Water actively monitors lodgement and escalates non-compliance. The good news: catching up is straightforward. The cost of waiting isn’t.
The Real Cost Of An Overdue Backflow Test
Annual backflow testing isn’t a soft deadline. Sydney Water audits the register, sends reminders, applies monitoring fees and can escalate to inspection charges and water restriction if the device stays out of compliance.
Reminder Notices
First notice followed by escalating reminders. Each one increases urgency and the risk of further action.
Sydney Water Inspection Fees
If Sydney Water has to dispatch its own plumber to inspect a non-compliant device, the charge applied to the property can be substantial much higher than arranging the annual test yourself.
Water Supply Restriction
For continued non-compliance, Sydney Water can restrict or disconnect the water supply until the device is tested and reported.
If your test is overdue, the fastest path back to compliance is to request a quote or call 1300 096 668. We’ll prioritise overdue jobs and lodge the report as soon as the test passes.
The Service Explained
What Happens If The Device Fails
A failed annual backflow test isn’t unusual seals wear, springs lose tension, debris lodges in check valves over a 12-month cycle. The test exists to catch these issues before they let contaminated water through.
When a device fails, Apex explains exactly what failed and why, then quotes the repair or replacement work. Common fixes include seal kit replacement, spring renewal or clearing debris. Larger sites or aged devices may need a replacement.
Once the repair is complete, we retest the device on site and lodge a passing report so your property returns to compliance. Where the work goes beyond what can be completed during the test visit, we book a return visit and keep Sydney Water informed.
For broader device problems including new backflow device installation, hazard reassessment or repeated failures see our main backflow prevention service.
Why Devices Fail
Worn seals · Spring fatigue · Debris on check valve seats · Corrosion on internal components · Relief valve fault on RPZ units · Damaged test cocks · Pressure inconsistency due to upstream plumbing.
What Apex Does Next
Quote the repair. Order parts if not on the van. Complete the work. Retest. Lodge the passing report. All before the device returns to ongoing service.
Why Apex
Why Sydney Property Owners Trust Apex For Annual Testing
Licensed plumbing, clear scope, fixed pricing and a team that knows Sydney Water’s lodgement requirements inside out.
Properly Licensed
NSW Plumbing Licence 306733C. Backflow-accredited plumbers eligible to lodge test reports with Sydney Water.
26+ Years On The Tools
Over two and a half decades of hands-on Sydney plumbing experience across residential, strata and commercial work.
122+ Five-Star Reviews
Honest advice, on-time arrival and clear communication backed by 122+ verified five-star reviews from customers across Sydney.
Fixed Quotes
Fixed pricing on the agreed repair scope. You know what the test costs and what any servicing costs before work begins.
Workmanship Guarantee
Every backflow test, repair and replacement is backed by an Apex workmanship guarantee.
24/7 Sydney Availability
Need an urgent test, retest after a failed inspection or related emergency plumbing response? Apex is available 24/7 across Sydney.
Read what customers say on our reviews page or learn more about Apex Plumbing Services.
FAQs
Annual Backflow Testing FAQs
Who is required to do annual backflow testing in Sydney?
Any property connected to Sydney Water with a medium or high hazard rating must have its testable backflow containment device tested every 12 months by an accredited backflow plumber. The property owner is responsible for arranging the test and ensuring the report is lodged, even where a strata manager or tenant occupies the site.
How long does annual backflow testing take?
A standard annual backflow test usually takes 30 to 60 minutes per device for an accessible containment device in good condition. Larger sites with multiple devices, restricted access or repair work can take longer. Apex confirms the expected on-site time when we quote.
Will you lodge the test report with Sydney Water on my behalf?
Yes. Apex prepares the Sydney Water backflow prevention test report on site and lodges it on your behalf within the required reporting window. You receive a copy for your records and we diary your next annual due date so the reminder doesn’t catch you off guard.
What happens if my backflow device fails the annual test?
If the device fails, we explain exactly what’s wrong (worn seal, weak spring, debris, relief valve fault, etc.) and quote any servicing or replacement work. Once the repair is complete, we retest and lodge a passing report so your property returns to compliance. Many issues can be resolved during the same visit.
How much does annual backflow testing cost in Sydney?
Annual backflow testing pricing depends on device type, access, how many devices are on site and whether any servicing is required. Apex provides a fixed quote once we understand the scope, so there are no surprises after the test is complete. Request a free quote and we’ll confirm pricing before booking.
What happens if I miss my annual backflow test?
Missing the test can trigger Sydney Water reminder notices, additional monitoring or inspection fees, potential restriction of your water supply and increased liability if a contamination event occurs while the device is overdue. The fastest way back to compliance is to book the overdue test and have a passing report lodged.
Do you test double check valves, RPZ devices and DCDAs?
Yes. Apex tests all common testable backflow devices found across Sydney properties including reduced pressure zone (RPZ) devices, testable double check valve assemblies, double check detector assemblies (DCDA) on fire services and pressure vacuum breakers. The device type determines the exact test procedure under AS/NZS 2845.3.
Will you remind me when next year's test is due?
Yes. Apex records your device, the test date and your contact details, then reaches out ahead of your next annual due date so you don’t have to rely on the Sydney Water reminder letter to stay compliant.
Book Your Annual Backflow Test In Sydney Today
Licensed. Accredited. Fixed quote before work starts. We test, we lodge, we remind you next year that’s the whole job.
