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Did you know that the most destructive plumbing system is not even the most expensive to replace?
According to 2026 data, the average cost of a burst flexi hose has reached $30,000 with some claims exceeding $100,000! In one Queensland case, a family returned from holiday to find their home devastated by a single failed hose, with repairs over $500,000!
This flexible, braided hose is found everywhere in our homes; under kitchen sinks, behind bathroom vanities, connecting toilets, and supplying washing machines and dishwashers. As a result, they are easy to overlook…until one fails!
In this guide, we'll look at why flexible hoses fail, what happens when one bursts, what your home insurance may cover, and the simple checks and maintenance habits that can help protect your home from costly water damage.
A flexible hose, or flexi hose, is a plumbing connector that links a tap, toilet or appliance to your home's water supply. Most flexi hoses have a rubber or synthetic inner tube surrounded by braided stainless steel, with a metal fitting crimped onto either end. This combination gives the hose enough strength to handle pressurised water while still allowing it to bend around corners and fit into tight spaces. For plumbers, that makes them particularly useful under vanities, kitchen sinks and behind appliances where rigid pipework can be difficult to install.
But that flexibility is also a potential weak point.
Unlike a fixed copper or PEX pipe, a flexi hose has several components that deteriorate over time. The inner tube degrades, the stainless-steel braid corrodes, and the crimped connections can become compromised. When any of these components fail, the result can be a sudden and uncontrolled release of mains-pressure water.
A failed flexi hose doesn't give you much warning if you’re not looking too closely. One moment everything is working normally; the next, a split hose or failed fitting can send mains-pressure water pouring into your home.
This hose is connected directly to your pressurised water supply, so a split or blown connection can produce a continuous flow. And unlike a tap left running, there's nothing convenient to turn off at the fixture itself. If nobody is home to isolate the water, the flow continues until someone intervenes.
The longer it runs, the further the damage travels and the more difficult the cleanup becomes.
Water can work its way underneath flooring, behind walls and into cabinetry, where it can stay trapped long after the room is cleared and dried. Any hidden moisture can create a second wave of problems, including mould, unpleasant odours, damaged plasterboard and deterioration of timber or other building materials. There's also an electrical risk. If water has reached power points, wiring or appliances, the area may remain hazardous even after the obvious flooding has been cleaned up.
| What to Do If a Flexible Hose Bursts• Shut off the water immediately, at the isolation valve if you can reach it, or at the mains if you cannot• Protect people and electrical systems, and stay out of any area where water has reached power points or switches• Minimise further damage by removing standing water where it is safe, moving unaffected belongings clear, and ventilating the space• Document the damage with photos and video of the hose and every affected area, before anything is moved or cleaned up• Contact your plumber and your insurer, and follow your insurer's claims process from there[More About Emergency Plumbing] |
A burst flexi hose might cost only a few dollars to replace. The water damage it causes can cost tens of thousands. Whether your insurer covers a burst flexi hose comes down to the difference between the failed part and the damage it caused.
The Hose Itself vs the Resulting Damage: Most home insurance policies aren’t designed to cover the cost of a $20 replacement part. What they are designed to cover is the flooring, cabinetry, walls and belongings damaged by failure. This is commonly addressed under escape of liquid or water damage cover, depending on the insurer and policy.
What Home Insurance May Cover: Your level of cover, applicable limits, exclusions and excess can all affect the outcome. Your insurer will consider the circumstances of the incident, the condition of the plumbing, your maintenance responsibilities and the specific terms of your policy. The safest approach is to check your Product Disclosure Statement (PDS) rather than assuming you're covered. If you're unsure, speak directly with your insurer before you need to make a claim.
The circumstances surrounding the failure can make a significant difference. For example, an insurer may look more closely at a claim where:
• Existing damage or a gradual leak that was building for weeks or months before the full failure
• Lack of maintenance, particularly if a hose was visibly corroded or damaged and left unaddressed
• Negligence, such as leaving a known issue unrepaired after being warned by a plumber
• Poor or unlicenced installation, which some insurers may treat as a policy exclusion
• Standard policy exclusions and conditions specific to your insurer and cover level
• Failure to take reasonable steps to limit further damage once the leak was discovered
In many cases, there are clues that something is wrong, but they're often hidden under a sink, behind a vanity or tucked behind an appliance where nobody thinks to look. However, a quick inspection can tell you a lot!
If something looks damaged, corroded or out of place, don't ignore it. A five-second check today could prevent a much bigger problem later.
One of the biggest traps with flexi hoses is assuming that a quick visual check tells you everything you need to know.
It doesn't.
Deterioration can begin inside the hose before there are obvious external signs. The internal tubing can lose strength over time while the outer braid continues to look clean and intact. That's why waiting for a crack, bulge or visible leak isn't always the best approach. By the time a problem becomes obvious, the hose may already be significantly compromised. For older hoses, proactive replacement can make more sense than waiting for a warning sign that may never appear.
There isn't one replacement date that applies to every flexi hose. How long one lasts depends on several factors, including the quality of the product, how it was installed, water pressure and the environment around it.
As a general industry guide, flexible hoses are commonly expected to last around five to ten years. A quality hose that's correctly installed and operating in suitable conditions may reach the upper end of that range, while a lower-quality or poorly installed hose may deteriorate much sooner.
| If you have no idea how old the hoses in your home are, it’s probably time for a replacement! |
Replacing a flexi hose might look like a straightforward DIY job, but you're dealing with a live, pressurised water connection. If something goes wrong during removal or installation, a preventative maintenance job can quickly become the flooding event you're trying to avoid!
If you spot corrosion, damage, leaking or an awkwardly positioned hose, or simply aren't confident about its condition, it's best to have a licenced plumber inspect it.
It’s easy to forget about the flexible hoses around your home. But, as we’ve seen, failure can have some very expensive consequences. Fortunately, a little attention can go a long way. Checking your flexi hoses, keeping an eye out for corrosion or damage, and replacing older hoses before they fail can help you avoid a much bigger plumbing problem.
And if you’re not sure how old your hoses are or whether they’re still in good shape, you don't have to figure it out yourself.
Plumberoo can help. Our experienced plumbers can check the flexible hoses around your home, identify signs of wear or damage, and replace hoses that are getting past their best. Book an inspection today.
Most home insurance policies cover the resulting water damage, since a burst flexi hose is typically treated as a sudden and accidental escape of water. Coverage for the hose itself, gradual leaks, or damage linked to poor maintenance varies by insurer, so always check your specific Product Disclosure Statement.
Most flexible hoses are built to last five to ten years, though this varies with product quality, water pressure, installation and environment. A hose that looks fine on the outside can still be deteriorating internally, which is why age-based replacement is worth following even without visible warning signs.
The most common causes are age-related deterioration, corrosion of the steel braiding, high or fluctuating water pressure, poor or DIY installation, and kinking or twisting during fitting. Manufacturing defects can occasionally cause a hose to fail even when it appears to be in good condition.
Look for rust or discolouration on the braiding, bulging or cracking along the hose, kinks or excessive bending, dampness or drips near the fittings, and any looseness at the connection points. Any one of these is a reason to call a licenced plumber rather than wait and see.
There is no single number that fits every home, but most plumbing guidance points to a five to ten year replacement window, taken proactively rather than waiting for a hose to show visible damage. Dishwasher and washing machine hoses, which run under constant use, are worth prioritising.
It can, and this is when the damage tends to be worst. Because a flexi hose is under constant mains pressure, water keeps flowing until someone shuts off the supply. A hose that fails on a weekend or during a holiday can flood a house for a full day or more before anyone finds it.
Shut off the water supply immediately, avoid any area where water has reached power points or wiring, remove standing water where it is safe to do so, photograph the damage before cleaning up, and call a licenced plumber and your insurer as soon as possible.
It is possible for a simple, easily accessible connection, but flexi hoses work on a pressurised water line, and current Australian Standards require WaterMark-certified assemblies fitted correctly to remain compliant. For anything beyond a straightforward swap, a licenced plumber ensures the job is done to standard and stays covered by your insurance if something later goes wrong.
Home insurance typically covers the resulting water damage, such as flooring, cabinetry and belongings, rather than the cost of the failed hose itself. The hose is a low-cost maintenance item; the damage it can cause is what your policy responds to.
A slow, hidden leak behind a cabinet or under flooring can create the damp conditions mould needs within 24 to 48 hours. Because these leaks are often out of sight, they can run for weeks before anyone notices the smell or staining that gives them away.