When a backflow device needs commissioning, annual testing or a check after maintenance, clear records and site access details can make the process easier. Find a Master Plumber connects commercial and industrial customers with plumbing businesses associated with Master Plumbers WA for backflow testing and related work.
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Ace Plus is a leading provider of integrated asset management, maintenance, and construction services to the market.
PUMPS • PLUMBING & GAS • ELECTRICAL • BUILDING MAINTENANCE • CONCRETE SCANNING • GPR • VACUUM EXCAVATION
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Rowson’s Plumbing Services is a proudly Western Australian owned and family-operated business providing commercial, industrial and residential plumbing services throughout the Perth metropolitan area. Established in 1998, the company has built a strong reputation for professional workmanship, reliability, safety and customer service.
Available 24... hours a day, seven days a week, Rowson’s provides commercial plumbing maintenance, emergency plumbing, blocked-drain clearing and CCTV inspections, gas services, hot water systems, leak detection, backflow prevention, strata plumbing and pump installation, servicing and repairs. The team is supported by ongoing in-house training and holds Master Plumbers Association membership, Waterwise Plumber recognition and WPCG accreditation.
Rowson’s is a multi-award-winning business, including the 2023 MPA Business of the Year for Commercial Maintenance Plumbing and Gas, reflecting its commitment to quality, compliance and long-term client relationships.
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All Plumbing Aspects is a professional plumbing and gas business based in Belmont, Western Australia, servicing residential and commercial clients across Perth and the wider metropolitan area. The business provides 24/7 plumbing and gas solutions, with services including blocked drains, pipe relining, hot water systems, leak detection, water... filtration, gas fitting, general plumbing and emergency plumbing.
With more than 20 years of combined industry experience, All Plumbing Aspects combines modern plumbing technology with reliable workmanship and responsive customer service. The business is particularly known for pipe relining, offering a no-dig repair solution for blocked or damaged drains, helping reduce disruption, time and cost for clients.
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Family-owned plumbing and gas fitting business in Carlisle, looking after homes, strata and commercial properties across Perth and Peel since 2002. Winner of Outstanding Service & Trade at the 2026 Perth & Regions Local Business Awards, and the 2026 Australian Small Business Champion for plumbing.
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Precision Plumbing (WA) Pty Ltd is an established Western Australian plumbing contractor based in Kewdale, providing commercial, industrial and residential plumbing services throughout Perth and regional WA.
Since commencing operations in 2005, the company has delivered plumbing, gas fitting and hydraulic services for commercial construction,... maintenance, industrial facilities and residential developments. Known for quality workmanship, professional project delivery and dependable service, Precision Plumbing (WA) works closely with builders, developers and commercial clients to deliver reliable plumbing solutions that meet the highest industry standards.
As a member of the Master Plumbers and Gasfitters Association WA, the business remains committed to safety, compliance and excellence across every project it undertakes.
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Link Plumbing & Gas Service is a trusted Western Australian plumbing and gas contractor providing professional residential, commercial and government plumbing services throughout the Perth metropolitan area. With more than 36 years of industry experience, the company is recognised for its fast response, quality workmanship and specialist expertise... in hot water systems, plumbing maintenance and gas services.
As an accredited Rheem Service Agent, Link Plumbing & Gas Service combines experienced licensed plumbers and gas fitters with a customer-first approach, offering same-day service where possible, 24/7 emergency assistance and dependable plumbing solutions backed by professional workmanship and transparent pricing.
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GA PERRY is one of Western Australia’s longest established plumbing and maintenance service providers, delivering plumbing, gas fitting, electrical and hot water solutions across the Perth metropolitan region. Established in 1896, the business has built a strong reputation for reliable service, technical expertise and responsive maintenance... solutions for residential and commercial clients throughout Perth.
With more than 125 years of industry experience, GA PERRY provides plumbing, gas, electrical and hot water services backed by fully licensed tradespeople and a strong customer service focus. The business operates 24/7 emergency response services and is recognised for its commitment to punctuality, transparent pricing and practical repair-first solutions.
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Sanwell Pty Ltd is a Perth-based hydraulic services contractor with more than 40 years of experience delivering major commercial, industrial and civil infrastructure projects throughout Western Australia.
Established in 1984, the company specialises in hydraulic services, water and sewer infrastructure, gas services, fire systems and large-scale... civil works for commercial construction, healthcare, education, defence and resource sector clients.
Known for its technical expertise, long-standing workforce and ability to deliver complex projects from design through to completion, Sanwell has built a reputation as one of Western Australia’s leading hydraulic services contractors.
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Backflow testing helps confirm whether a testable backflow prevention device is still protecting the drinking water supply as intended. For businesses, facilities and industrial sites, the task often sits alongside asset management, access controls and the need to limit disruption to normal operations.
Testable devices have moving parts, seals, springs, check valves, relief valves and test points. Over time, components can wear, become fouled with debris, leak or stop holding pressure correctly. A field test provides a practical check of device performance and can identify whether repair, replacement or further investigation may be needed.
When backflow testing may be required
Backflow testing may be arranged following installation, as part of ongoing device management, or after maintenance, repair or replacement. It can also be relevant when a device is leaking or discharging, when records need updating, or when a site needs a current test report for its own administrative requirements.
In Western Australia, Water Corporation requires boundary containment backflow devices to be registered and tested at commissioning. Subsequent testing is required annually or after maintenance. Water Corporation states that test reports must be submitted through its online lodgement system by an accredited backflow tester permitted to test those devices.
Water Corporation also states that installation, commissioning and repair of backflow prevention devices must be carried out by a licensed plumbing contractor, while accredited backflow testers can test testable devices. Confirm the scope of your particular job with the plumbing business you choose.
What happens during commercial backflow testing
Commercial backflow testing involves inspection and field testing of the device. The tester may record the device condition and readings, assess whether its operation aligns with expected performance, and identify whether servicing, repair, replacement or further investigation is appropriate.
Depending on the device and its condition, related work may involve cleaning strainers or internal components, replacing seals, springs, check valves or relief-valve parts, or investigating a failed test. A failed result does not by itself determine the final solution; the condition of the device and the site circumstances need to be considered.
For commercial backflow prevention testing, ask how test results and any recommended follow-up work will be documented. This supports clearer communication between site contacts, maintenance teams and the plumbing business.
Information that helps a plumbing business prepare
Good information before attendance can help a plumbing business understand the asset, arrange appropriate access and work around operational restrictions. Useful details include:
the device make, model, size, serial number and asset ID, where available;
previous test reports, maintenance history and Water Corporation registration details;
the exact device location, photographs of the valve assembly and any visible labels;
whether the device is leaking or discharging, and whether water can be isolated;
site contact details, access instructions, induction requirements and permitted working hours;
shutdown restrictions, tenant or business continuity considerations, and the person authorised to approve repairs; and
the report format needed and the reason for the test, such as routine compliance, a fault, water loss, sale or insurance.
For an industrial backflow testing enquiry, also flag relevant safety permits, process impacts, environmental controls, confined-space risks, hot works requirements and critical production impacts. These details help the plumbing business assess the practical conditions before attending.
Testing, repairs and installation are different jobs
Service
What it addresses
Backflow testing
Inspection and field testing to assess whether a testable device is operating as intended.
Repairs and maintenance
Attention to worn, leaking, damaged or failed components and devices.
Installation
Work associated with fitting and commissioning a backflow prevention device.
Knowing which outcome you need helps direct the enquiry. If the immediate requirement is a test but the device fails, the plumbing business can discuss the appropriate follow-up work and any site considerations.
Products and equipment you may encounter
Backflow assemblies, components and testing equipment can be associated with a range of brands and supply channels. Examples customers may encounter include Watts, Febco, Zurn, Wilkins, Apollo, RMC, AVG, Bermad, Ames and Enware. Reece, Galvins, Tradelink, Parkwood Plumbing Centre, Bunnings and Plumbing Plus are also among the supply channels associated with backflow products.
Names on an existing device, valve assembly or test equipment can be useful reference details when making an enquiry. They do not, on their own, establish the condition of a device or the work required.
Choose a Master Plumber with the right information
Find a Master Plumber is backed by the Master Plumbers and Gasfitters Association of Western Australia. It connects customers with Master Plumbers and plumbing businesses associated with Master Plumbers WA, helping customers make a more informed choice of plumbing business for a property or project.
For a commercial backflow device testing request, be clear about the device, site and operational constraints rather than relying on a broad description. This gives the plumbing business a more useful starting point for discussing the testing work and any likely follow-up.
It is the inspection and field testing of a testable backflow prevention device to confirm whether it is still protecting the drinking water supply as intended.
When are boundary containment devices tested in Western Australia?
Water Corporation requires registered boundary containment backflow devices to be tested at commissioning, then annually or after maintenance.
What if a device fails its test?
A failed test can indicate a need for fault diagnosis, servicing, repair, replacement or further investigation. The appropriate next step depends on the device condition and site circumstances.
Who can test a registered device?
Water Corporation states that test reports for these devices must be submitted through its online lodgement system by an accredited backflow tester permitted to test them.
What should I provide before testing is arranged?
Provide available device and asset details, prior reports, the location, access requirements, site restrictions, isolation information and the appropriate site contact.
Use Find a Master Plumber to choose a plumbing business for commercial or industrial backflow testing. Have your device details, previous reports and site access requirements ready to support a clearer enquiry.
