Backflow Prevention Testing & Installation Bayswater
We install, test and certify backflow prevention devices for commercial and residential properties across Bayswater and Melbourne's eastern suburbs. If your water authority has sent you a testing notice, we carry out the test and lodge the paperwork for you.
- Testing & Certification Handled We carry out the annual test and lodge the certification with your water authority, so your compliance stays up to date.
- Trusted By Homeowners With over 160 5-star reviews, our satisfied customers speak for us.
- Licensed & Accredited Backflow work carried out by a licensed plumber. Upfront pricing before any work begins.
Keeping used water out of the drinking supply
Backflow is when water flows the wrong way through the plumbing and pushes used or contaminated water back towards the drinking supply. It usually happens when pressure in the mains suddenly drops, or when a private setup on your property builds up more pressure than the mains and forces water back the other way.
That matters because the water heading back can carry things you would never want in a drinking line, such as garden chemicals, fertiliser, rainwater tank water, or fluid from a fire or industrial system. A backflow prevention device is a one way valve that closes off that path and keeps the supply clean, for your property and for everyone else on the same network.
Properties that commonly need a backflow prevention device include:
- Many commercial and industrial premises
- Homes and sites with an irrigation or sprinkler system
- Rainwater tanks plumbed into the mains supply
- Properties with a fire service or fire sprinklers
- Setups where non drinking water could reach a drinking line
If you are not sure whether your property needs a device, we can talk it through and let you know. It is part of the wider home plumbing work we do across the eastern suburbs.
Installation, annual testing and certification, all sorted
Where a testable backflow prevention device is required, we supply and install the right device for your setup and connect it so it does its job without getting in the way of your normal water use. Once it is in, that device has to be tested every year by a licensed plumber with backflow accreditation.
That annual test is a compliance requirement set by your water authority. They keep a record of every device and send a notice when a test is due. We carry out the test, complete the certification, and lodge it with the water authority before the deadline, so you are not left chasing paperwork or worrying about a missed date.
- Supply and installation of testable backflow prevention devices
- Annual testing by a licensed, accredited plumber
- Certification completed and lodged with your water authority
- Repair or replacement if a device fails its test
- Testing notices from your water authority taken care of
- Upfront quotes, no surprises on the day
Buying, selling, or checking over a site? Our property and pre-purchase inspections can flag backflow and other compliance issues before they become your problem.
Get a QuoteTrusted by over 160 melbourne home owners
- Carla D Home Owner
Jason is a reliable plumber, super responsive and arrives on time. there were a few logistical issues in our old 1970s bathroom renovation and he was honest about what could reasonably be done and worked within our budget. Our go-to guy for plumbing!
- Holly S Home Owner
Upon getting in touch with Jason from McPherson Plumbing & Maintenance, he promptly dispatched his wonderful team to address both issues in just a matter of days. I cannot speak highly enough of this group. It is reassuring to know that Jason and his team are dedicated to going above and beyond, all while offering fair pricing.
- Carlos R Home Owner
Jason is very professional and always very honest about his work. We were very happy with his work. We did a big bathroom and kitchen renovation and he did all the plumbing for us.
Get a Quote for Backflow Testing or Installation in Bayswater

Need a device installed, a test done, or a testing notice from your water authority sorted? Get in touch. We can talk through what your property needs and give you a quote before we start.
- Phone 0407 696 994

Local, licensed and on top of the compliance side
McPherson Plumbing is based in Bayswater North and looks after backflow prevention for properties across Melbourne's eastern suburbs, including Knox, Boronia, Heathmont, Wantirna, Ringwood, and surrounding areas.
Backflow work is as much about the paperwork as the plumbing. A device that is installed well but never tested and lodged still leaves you out of compliance. We handle both sides, the install and the annual testing and certification, so nothing slips through the cracks and you are not the one keeping track of due dates.
We quote before we start and keep the process simple. If you have a notice in hand, bring it to the call and we will match it to your device and sort the rest.
Why locals and businesses choose us for backflow
- Installation, testing and certification all in one place
- Certification lodged with your water authority on time
- Licensed plumber with backflow accreditation
- Commercial and residential work both covered
- Upfront quotes, no hidden charges
Backflow Prevention FAQs
Backflow is when water flows backwards through your plumbing, against the normal direction, and pushes used or contaminated water back into the drinking supply. It can happen when pressure in the mains drops or when a private setup builds up higher pressure than the mains. A backflow prevention device is a one way valve that stops that from happening, which protects both your water and everyone else connected to the same supply.
Many commercial and industrial properties are required to have one. Plenty of residential properties do too, usually where there is an irrigation system, a rainwater tank plumbed into the mains, a fire service, or another setup that could let non drinking water back into the supply. If you are not sure, give us a call and we can tell you whether your property is likely to need a device.
Testable backflow prevention devices need to be tested once a year by a licensed plumber with backflow accreditation. The water authority tracks this and sends a reminder or notice when your test is due. After each test we lodge the certification with your water authority so your records stay current.
Give us a call and we will take care of it. We carry out the annual test, complete the paperwork, and lodge the certification with your water authority before the due date. You do not need to work out any of the compliance side yourself. Have the notice handy when you call so we can match it to your device.
Yes. We install new testable backflow prevention devices where one is required, and we carry out the annual testing and certification on existing devices. If a device fails a test we can repair or replace it and retest so you stay compliant.
Yes. We handle backflow prevention for commercial and industrial properties across Melbourne's eastern suburbs, as well as residential setups. We can manage installation, annual testing, and the certification lodgement, and we are happy to work in with property managers and facilities teams on scheduling.









