Backflow Testing Perth & Backflow Prevention
HouseWorks Plumbing & Gas installs and tests backflow prevention devices across Perth. Backflow is when used or dirty water flows back into the clean drinking water supply. A backflow device stops it, and testable devices must be checked every year by a licensed plumber.
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Keep Your Water Clean with Backflow Protection
Backflow happens when water moves the wrong way through your pipes, pulling used or contaminated water into the clean supply. It can make water unsafe to drink and can affect your neighbours’ supply too.
We install, test, repair and replace backflow prevention devices for homes, rentals and businesses, so your water stays safe and your property stays compliant. We also handle emergency plumbing, blocked drains, hot water systems and gas fitting.
How Backflow Starts
Backflow usually begins with a sudden drop in water pressure. When that happens, it creates a small vacuum in the system that can pull used or contaminated water backward into clean lines. This can happen if there’s a broken pipe, high water use nearby, or during firefighting activity.
Faulty plumbing design can also cause cross-connections—places where clean water lines and potential contaminants meet. Garden hoses, pools, or irrigation lines connected without the right protection are common risk points. Once contaminated, your home’s water can quickly become unsafe to use or drink.
Where Backflow Risks Hide
Many setups around your home can create a backflow risk if not protected. These include outdoor taps with connected hoses, garden irrigation systems, spa baths, pool connections, and even indoor appliances like dishwashers and boilers. If any of these features don’t have the right safety measures in place, they can push dirty water into your drinking supply when pressure drops.
You won’t always see backflow when it starts. That’s why prevention is key—not just after something happens, but before.
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What a Backflow Device Does
Backflow prevention devices keep water moving in one direction—into your home, not back out and in again. These devices include valves and air gaps, depending on how your system is set up and how much risk exists.
There are several types of devices we may use:
- Air Gaps: Spaces between taps and fixtures so water can’t be pulled back into pipes
- Double Check Valves: Often used for low-risk areas like small irrigation setups
- Reduced Pressure Zone Devices (RPZs): Used for higher-risk areas with strong contamination potential
We assess your setup to find the right device and install it to meet safety and legal standards.
Why Licensed Installation Matters
Only licensed plumbers can install or test backflow devices, and the work must meet Water Corporation rules. We check your system, choose the right device, install it and test it.
After each test, we complete the test report and submit it to the right authority, so you have a record without chasing paperwork.
Custom Solutions for Perth Homes
The right device depends on how your property is used. A pool top-up, a garden irrigation system, a new extension or a business with chemicals on site all carry different levels of risk, and each needs a device that matches it.
Annual Backflow Testing in Perth
Valves wear and debris builds up inside a backflow device over time. If it fails, you may not notice anything until the water is already contaminated. That is why testable devices need checking every year where the law requires it.
At each test, our licensed plumber runs pressure checks on the device, inspects its parts and records the results. We keep track of your test date and remind you when the next one is due.
Call (08) 6400 5390, Monday to Friday, 7am to 4pm, for an upfront quote with no call-out fee.
Backflow testing FAQ
How often does a backflow device need testing?
Every 12 months for testable devices, where the law requires it.
Who needs backflow protection?
Properties with garden irrigation, pool or spa connections or commercial equipment are the usual ones. We check your setup and tell you what is needed.
What should I have ready for a test?
Where the device is, roughly how old it is and any previous test report.
Can a failed device be repaired?
Often, yes. Worn seals and springs can usually be replaced and the device retested. If it is too old or damaged, we quote a replacement.
Our Approach to Backflow Prevention
We show up when we say we will and explain what we find in plain words. HouseWorks Plumbing & Gas is a licensed plumbing business based in Leeming (plumbing licence PL 8396), a finalist in the 2026 Australian Trades Small Business Champion Awards, with a 4.7 rating from 123 Google reviews.
Backflow Services We Provide
- Backflow device installation
- Annual backflow testing and reports
- Repair and replacement of failed devices
- Backflow risk checks for new pools, irrigation and extensions
Book a Backflow Test
Send us your address and a photo of the device, and we will book a time that suits you.
- Expertise in Plumbing & Gas – Our team combines years of industry experience with a focus on modern water filtration solutions.
- Friendly, Professional Service – We pride ourselves on building strong relationships with our clients, providing support every step of the way.
- Customer Satisfaction Guaranteed – We don’t consider a job complete until you’re fully satisfied.
- Licensed & Insure – All work is carried out by certified professionals, giving you peace of mind.
- Tailored Solutions – Every installation, repair, or maintenance service is customised to suit your property and water needs.
Meet Tim, our owner and principal plumber
Book Now and Protect What Matters Most
Backflow can put your family’s health at risk—and you may not know it until it’s too late. Don’t leave it to chance. Let us help you make sure your water supply stays clean, safe, and protected. Reach out to book a backflow inspection or installation today. We’re ready to walk you through your options and get the job done right. Call now and take control of your home’s water safety before problems can start.