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A flexi hose is the braided stainless steel connector joining your taps, toilets and appliances to the water supply, and it lives under mains pressure 24 hours a day. Replace them every 5 to 10 years, check them every 6 months, and never trust one past its stamped date. Insurers consistently rank burst flexi hoses among the leading causes of internal water damage claims in Australian homes, because when one lets go it doesn’t drip, it runs, hundreds of litres an hour into a cupboard, a kitchen, or the apartment below.
Ask yourself one question: how old are the hoses under your basins? If you don’t know, you’ve found the problem this page exists to fix.
What a flexi hose is and why it fails
Under the shiny braid is a rubber tube. The stainless braid carries the pressure; the rubber carries the water. Failure usually starts in the braid: strands corrode or fray, the rubber balloons through the gap, and eventually it bursts. And because the hose sits on mains pressure, there’s no polite trickle stage. It runs flat out until someone turns the water off at the meter.
What kills them, in the order we see it:
- Age. Rubber perishes. Most hoses are rated for 5 to 10 years, and many have the date stamped on the collar.
- Corrosion. The cleaning chemicals stored under the sink quietly attack the braid, and so does plain trapped moisture in a closed cupboard.
- Tension and twist. A hose installed stretched, kinked or twisted fails years early.
- Cheap hardware. Bargain hoses with plastic nuts and thin braid are a false economy sitting a metre above your floorboards.
The six-monthly check anyone can do
Take a torch. Open the cupboard under every basin, the kitchen sink, and look behind each toilet. You’re after rust spots or discolouration on the braid, frayed or lifted strands, kinks, bulges, or any dampness at the connections. Run a dry finger along each hose; moisture you can’t explain is a warning, not a mystery. Anything past 10 years, or of unknowable age, replace on principle. The part is cheap. The insurance claim is not.
This pairs naturally with the cold-weather checks in our guide to braided pipes before winter, because pressure spikes and cold snaps are when marginal hoses choose their moment.
The quiet failure that makes them so destructive
A burst pipe in a wall announces itself. A flexi hose fails silently inside a cupboard, often while nobody’s home, and a burst hose in an empty house runs for days. Two habits shrink that risk to almost nothing. First, make sure everyone in the house knows where the water meter is and how to turn it off; in a flexi failure, that knowledge is worth more than any tool we carry. Second, if you’re going away, turn the water off at the meter on your way out. Costs nothing, saves houses.
If you do come home to water, our emergency plumbers attend 7 days across Melbourne. And when water is appearing somewhere with no obvious source, a hose weeping slowly inside a cabinet or wall cavity is a prime suspect, which is exactly the case for water leak detection gear instead of exploratory demolition.
Replacement: yours or ours?
Swapping a like-for-like hose on a tap with a working isolation valve is within reach of a handy householder, provided the new hose is a quality item installed without twist or tension. In practice, we replace a lot of them as a small add-on during other jobs, and there are three situations where you shouldn’t go it alone: when the isolation valve is seized or missing, which is common in older homes; when the hose serves a cistern or appliance with awkward access; and when you’ve found one failed hose, because its siblings were installed the same day and are exactly the same age. Doing the lot in one visit is cheap insurance. Buy WaterMark-certified hoses with a stated warranty, and write the install date on the collar with a marker. Future you says thanks.
Frequently asked questions
What is a flexi hose? The braided flexible connector between your water supply and your taps, toilets and appliances. Nearly every home built or renovated in the past 25 years has several.
How often do flexi hoses burst? Often enough that insurers list them among the top causes of internal water damage claims nationally, with the risk climbing sharply past the 5-to-10-year mark.
How often should flexi hoses be replaced? Every 5 to 10 years, or immediately at any sign of rust, fraying, bulging or moisture. The six-monthly torch check takes five minutes for the whole house.
Are flexi hoses a common cause of flooding? Yes. They fail at mains pressure, inside cupboards, frequently with nobody home, which is precisely why the claims are so large.
Want every hose in the house checked, replaced where needed and dated in one visit? Call O’Shea Plumbing on 03 9888 2887 or book online. It’s some of the cheapest flood prevention money can buy.
