Licensed by the Plumbers, Gasfitters and Drainlayers Board
All our plumbers and gasfitters are PGDB registered certifying tradespeople — we can self-certify our own work for full compliance.
Backflow prevention in Auckland — annual IQP testing from $165 +GST per device, plus new installations and failed device repairs. Response Plumbing is IQP certified and tests, installs, and repairs RPZ valves, double check valves, and hose tap backflow preventers to Watercare requirements. Call 0800 877 586.
Backflow prevention is a mandatory water safety system that stops contaminated water from flowing backwards into the drinking water supply. Response Plumbing installs, tests, and certifies backflow devices across Auckland under Watercare requirements — annual IQP testing typically takes 30–45 minutes per device. All work is carried out by PGDB-registered certifying plumbers with $5 million liability insurance and IQP testing certification.
Backflow testing is a legal requirement — every testable device needs annual IQP certification. Most testing companies only test. If the device fails, you need to call a plumber, then call the tester back. We do both. Test, repair, retest, certify — all in one visit, one invoice. $0 call out fee.
Call Now — 0800 877 586
All our plumbers and gasfitters are PGDB registered certifying tradespeople — we can self-certify our own work for full compliance.
Response Plumbing provides backflow prevention installation and annual IQP testing across Auckland — North Shore, West Auckland, Auckland Central, East Auckland, and South Auckland. RPZ valves, double check valves, dual check valves, backflow device repairs, and Watercare compliance reporting. IQP certified tester and licensed plumber. $0 call out fee. Call 0800 877 586.
If your property has any of these, you're required to have backflow prevention installed and tested annually.
Garden irrigation, lawn sprinklers, and drip systems. Fertilisers, pesticides, and soil contaminants can siphon back into the water supply through irrigation lines. One of the most common backflow risks in Auckland homes.
Pool fill lines connected to mains water. Chlorinated, chemically treated pool water can backflow into the drinking supply. A testable backflow device is required on every pool and spa connection. If your pool fill line also needs a new outdoor tap or isolation valve, we handle that too.
Restaurants, cafes, bakeries, and food processing. Commercial dishwashers, pot wash sinks, and chemical dispensers all create cross-connection risks. Backflow prevention is a health and compliance requirement.
Dental chairs, autoclaves, and medical equipment connected to mains water. These create high-risk cross-connections requiring RPZ backflow prevention — the highest level of protection.
Fire suppression systems with chemical additives or stagnant water in the lines. Backflow prevention is required to stop contaminated fire system water from entering the drinking supply.
A garden hose submerged in a bucket of chemicals, connected to a spray gun with fertiliser, or left in a pool — all create backflow risk. Even residential properties with hose connections may require a backflow device.
Installation, annual testing, repairs, and compliance — we handle the full backflow lifecycle. We test, repair, and install all major brands including Watts, Wilkins, Febco, Apollo, and Ames.
Annual backflow testing is a legal requirement. Our IQP certified testers carry out the annual test on your backflow device, issue the compliance certificate, and report the results to the council. We test all brands and types — Watts, Wilkins, Febco, Apollo, Ames — RPZ, DC, and dual check valves. We'll remind you when the next test is due.
Device failed its annual test? We diagnose the fault — worn check valve seals, stuck relief valves, debris in the valve body — repair or replace the internal components, and retest. No need for a second visit with a separate plumber. We fix it, retest it, and certify it — all in one visit.
We install all types of backflow prevention devices — testable double check valves (DC), reduced pressure zone valves (RPZ), and dual check valves. We assess the risk level at each cross-connection, recommend the correct device, install it to NZ plumbing standards, and issue the initial test certificate. For properties needing new supply lines, we also handle water main installation — including no-dig installation with our own directional drill.
Old, corroded, or non-compliant backflow device? We remove the old unit, install a new device to current standards, test, certify, and report. We upgrade older devices to current Watercare-approved models and ensure full compliance.
Not sure if you need backflow prevention? We carry out a cross-connection risk assessment on your property, identify all connection points that require protection, and recommend the correct device for each. We handle the full compliance process including Watercare reporting.
Multi-device commercial properties, strata buildings, and facilities with multiple cross-connections. We manage the full backflow compliance programme — scheduling, testing, repairs, certification, and council reporting across all devices on your property. One provider, one schedule, full compliance. For urgent compliance issues, our emergency plumber team can respond same-day.
Different risk levels need different devices. Here's what we install and test.
Low risk
Non-testable brass dual check / hose connection vacuum breaker that screws directly onto external hose taps. Prevents garden hoses, fertiliser sprayers and pool fill lines from siphoning contaminants back into the drinking water supply. Compact, cost-effective and required on outside taps under NZ plumbing standards.
Medium risk
For irrigation systems, pool fill lines, and other medium-risk connections. Two independent check valves with test ports for annual IQP testing. The most common testable device in Auckland residential and light commercial properties.
High risk
The highest level of backflow protection. For commercial kitchens, medical and dental practices, chemical dosing systems, and fire sprinkler systems. Two check valves plus a relief valve that dumps water if either check fails. Required for all high-risk cross-connections.
Compact brass hose connection vacuum breaker / dual check valve. Screws directly onto external hose taps to stop garden hoses, sprayers and pool fill lines from siphoning contaminants back into the drinking water supply. Required on outside taps under NZ plumbing standards.
Get a Quote →
Testable DC valve with four test ports for annual IQP testing. Medium-risk device for irrigation systems, pool fill lines, and general cross-connections. The most common testable device in Auckland residential and light commercial properties.
Get a Quote →
Flomatic testable double check valve with ball valve isolation on both sides. Comes pre-assembled with test ports accessible for annual IQP testing. Faster install, cleaner finish — our preferred option for irrigation and pool fill backflow protection.
Get a Quote →
Flomatic RPZ valve with Watermark certification. The highest level of backflow protection — two check valves plus a relief valve that dumps water if either fails. Required for commercial kitchens, dental and medical practices, chemical dosing systems, and other high-risk cross-connections.
Get a Quote →
Large flanged RPZ valve for commercial and industrial backflow protection. Used on fire sprinkler systems, large irrigation mains, and high-volume commercial water connections. We size, supply and install commercial backflow assemblies including all isolation valves and strainers.
Get a Quote →
Our Akemetal calibrated backflow testing kit with NATA-traceable certification. Used for the annual IQP testing required on all testable backflow devices in Auckland. Properly maintained and recertified so every test we perform is compliant with AS/NZS 2845.3 and accepted by Auckland Council.
Get a Quote →Don't panic — a failed backflow test doesn't mean you're in trouble. It means the device isn't providing the level of protection it's supposed to, and it needs attention. Here's what happens next.
When a backflow device fails its annual IQP test, the tester is required to report the failure to the council. You'll typically be given a timeframe — usually 20 to 30 working days — to have the device repaired or replaced and retested. If you don't action it within that window, the council can issue a notice requiring compliance and, in some cases, restrict your water supply.
The most common reasons backflow devices fail are worn check valve rubber seals, a stuck or fouled relief valve (on RPZ units), debris or sediment inside the valve body, or corrosion on older devices. Most of these are straightforward repairs — we carry common seal kits and repair parts on the truck and can repair and retest same-visit. If the failure is related to pressure issues or a suspected leak upstream, our leak detection service can identify the root cause before we repair the device. If the device is too old or corroded to repair reliably, we replace it with a new unit, test it, certify it, and report the pass to the council. Either way, we get you back to compliant — fast.
This is where being both IQP certified and a licensed plumber matters. Most testing companies can only test — if the device fails, they leave and you need to call a plumber separately, then call the tester back for a retest. That's three visits. We do it in one: test, repair, retest, certify. Done.
Transparent pricing. Here's what common backflow jobs typically cost.
$120 – $250
Per device. Includes IQP test, compliance certificate, and council reporting. Price depends on device type and access.
From $250
Diagnose fault, replace seals or internal components, retest, and recertify. Most repairs completed same-visit.
From $450
Testable DC valve supply and install. For medium-risk connections — irrigation, pools, and general cross-connections.
From $800
Reduced pressure zone valve supply and install. For high-risk connections — commercial kitchens, medical, dental, and fire systems.
From $450
Remove old device, install new Watercare-approved unit, initial test, certification, and council reporting.
From $150
On-site cross-connection risk assessment. Identify all points requiring backflow protection and recommend correct devices.
From your call to a certified, compliant backflow system — straightforward and fully managed.
We visit your property, identify all cross-connection points, assess the risk level, and determine what backflow devices are required — or test the ones already installed.
New installation? We fit the correct device, connect to your plumbing, and carry out the initial test. Annual test? We test the existing device using calibrated IQP test equipment.
Pass or fail — we issue the test report. If the device passes, you get your compliance certificate. If it fails, we quote the repair and retest.
We report the test results to the council as required. We can also remind you when the next annual test is due so you never fall out of compliance.
IQP certified tester. All device types. Watercare compliant reporting. $0 call out fee.
0800 877 586We're both IQP certified testers and licensed plumbers. That means if your device fails, we can repair it on the spot and retest — no need to book a second visit with a separate plumber.
Most backflow companies only test — if the device fails, you need to call a plumber to repair it, then call the tester back. We do both. Test, repair, retest, certify — all in one visit.
We report all test results to the council as required by Watercare. You get your compliance certificate and the council gets their records updated. No paperwork gaps.
No call out fee, no travel charge. Upfront quote for testing and installation before any work starts.
Independently rated Auckland's top plumber. 4.8 stars on Google with 222+ verified reviews.
Forget when your test is due? We can set up annual reminders so you never fall out of compliance. One less thing to manage.
Need backflow testing or installation? We cover every suburb in greater Auckland.
Takapuna · Albany · Browns Bay · Birkenhead · Devonport · Milford · Castor Bay · Sunnynook · Torbay · Long Bay · Northcote · Glenfield · Beach Haven · Forrest Hill · Hillcrest
Orewa · Silverdale · Whangaparaoa · Gulf Harbour · Stanmore Bay · Red Beach · Army Bay · Millwater · Hatfields Beach · Arkles Bay
Henderson · Te Atatu · Hobsonville · Massey · Westgate · West Harbour · Kumeu · Huapai · Swanson · Glen Eden · Titirangi · New Lynn
CBD · Ponsonby · Grey Lynn · Herne Bay · Parnell · Newmarket · Remuera · Epsom · Mt Eden · Kingsland · Mt Albert · Pt Chevalier
Howick · Pakuranga · Botany · Half Moon Bay · Bucklands Beach · Flat Bush · Dannemora · East Tamaki · Beachlands · Maraetai · Clevedon · Whitford
Backflow prevention stops contaminated water from flowing backwards into the clean drinking water supply. Without a backflow preventer, changes in water pressure can cause water from irrigation systems, pools, hoses, or other sources to siphon back into the mains supply — contaminating drinking water for your property and potentially your neighbours.
If your property has irrigation, a swimming pool or spa, a commercial kitchen, medical or dental equipment, fire sprinklers, or any connection that could introduce contaminants into the water supply, you are required to have a backflow prevention device installed. Watercare Auckland requires backflow prevention on all medium and high-risk connections.
Backflow prevention devices must be tested annually by an Independent Qualified Person (IQP). This is a legal requirement under the Building Act and is enforced by Watercare in Auckland. If your device fails, it must be repaired or replaced and retested.
Annual backflow testing typically costs between $120 and $250 per device depending on the type and location. We provide an upfront quote before testing. If the device fails and needs repair, we quote that separately.
A testable double check valve installation starts from around $450. An RPZ valve installation starts from around $800. Cost depends on the device type, pipe size, and plumbing modifications required. We provide an upfront fixed-price quote — $0 call out fee.
An IQP is an Independent Qualified Person — someone certified to test and certify backflow prevention devices. IQP testing is a legal requirement. After testing, the IQP issues a compliance certificate that is reported to the council. Response Plumbing holds IQP certification for backflow testing.
The main types are testable double check valves (DC) for medium-risk connections, reduced pressure zone valves (RPZ) for high-risk connections, and dual check valves for low-risk residential connections. The type required depends on the contamination risk level.
If your property has a cross-connection risk and no backflow prevention, you are not compliant with Watercare requirements. You may receive a notice from the council requiring installation. More importantly, without backflow prevention, contaminated water can siphon back into the drinking water supply — a serious health risk.
Yes. If your device fails its annual test, we diagnose the fault, repair or replace the internal components, and retest. Common failures include worn check valve seals, stuck relief valves, and debris in the valve body. If beyond repair, we replace it and certify the new installation.
We cover all of greater Auckland — North Shore, West Auckland, Auckland Central, East Auckland and South Auckland. With plumbers across Auckland, most callouts are reached in under 30 minutes.
Yes. Under the New Zealand Building Code and the Health Act, backflow prevention is a legal requirement for any property that could potentially contaminate the public water supply. Watercare Auckland enforces this for all medium and high-risk connections, and annual testing by an IQP is mandatory.
The property owner is legally responsible for installing, maintaining, and annually testing backflow prevention devices. Commercial property owners must ensure compliance with Watercare requirements. If the device fails testing, the owner must arrange repair or replacement at their cost.
If your backflow preventer fails testing, the device must be repaired or replaced and retested. Your IQP will notify you of the failure and what's needed. Non-compliance can result in water supply disconnection from Watercare, so failed devices should be addressed immediately.
No. Backflow testing must be carried out by a certified Independent Qualified Person (IQP) registered with Auckland Council. The IQP issues an official compliance certificate that's reported to council. Self-testing or testing by an uncertified person does not meet legal requirements.
Most standard residential properties only require a basic dual check valve, which is typically installed at the meter by Watercare. However, if you have an irrigation system, swimming pool, spa, or any high-risk connection, you may need a testable backflow preventer. We can assess your property and advise.
A standard backflow preventer installation typically takes 2 to 4 hours depending on the device type, pipe size, and accessibility. More complex commercial installations may take a full day. We provide an estimated timeframe as part of our upfront quote.
A Double Check valve (DC) is used for medium-risk connections like irrigation and commercial applications. A Reduced Pressure Zone (RPZ) valve is used for high-risk connections involving potential contaminants like medical facilities, chemical plants, or industrial sites. RPZ devices have discharge ports and require more space for installation.
Response Plumbing is one of Auckland's most trusted providers of backflow prevention installation and testing. We're both IQP certified testers and PGDB-registered licensed plumbers — which means we can assess your property, recommend the correct backflow device, install it, test it, certify it, and report the results to the council. If a device fails its annual test, we repair it on the spot and retest — no second visit, no second invoice, no waiting for a separate plumber.
Backflow prevention is a legal requirement in Auckland for any property with a cross-connection risk. Watercare requires testable backflow devices on all medium and high-risk connections, and annual IQP testing is mandatory under the Building Act. If you've received a notice from the council, if your device is due for testing, or if you're not sure whether your property needs backflow prevention — call us. We carry out risk assessments, install the correct devices, and manage the ongoing compliance for residential, commercial, and multi-unit properties.
We install and test all types of backflow prevention devices — dual check valves, testable double check valves (DC), and reduced pressure zone valves (RPZ). We service all major brands — Watts, Wilkins, Febco, Apollo, and Ames — and carry common repair parts and seal kits on the truck. For commercial properties with multiple devices, we manage the full compliance programme — scheduling, testing, repairs, certification, and council reporting across every device on your site.
We also handle the plumbing work that often goes alongside backflow prevention — water main installation and repair, outdoor tap installation with backflow protection, water filter installation, and leak detection. Need an emergency plumber in Auckland? We're available 24/7. Every backflow installation is backed by our 5-year workmanship warranty and $5 million public liability insurance. Call 0800 877 586 for a free quote.
Why Licensed Plumbers Matter in NZ · Spring Plumbing Tips for Auckland
Prefer we call you? Fill this out and we'll call back within 15 minutes during business hours.
Every job backed by a 5-year written warranty. If something we installed fails, we fix it free — no questions asked.
Same-day service. Every vehicle carries a jetter. $0 call out fee. Work guaranteed.
0800 877 586