Ever heard a sudden bang or thud in your pipes that made you jump? That’s a water hammer in action—a surprisingly common issue in strata properties. It happens when water flow is suddenly cut off, creating shock waves that rattle through the plumbing. In apartment buildings and multi-unit complexes, where water pressure tends to be higher, and pipes are all connected, the effects can be even worse.
In this blog, we’ll break down what causes water hammer, the risks it brings, and the smartest ways to stop them before they become a disaster. A little know-how now could save you from a massive plumbing headache later!
Why Are Your Pipes Making That Loud Banging Noise?
Sudden Valve Closures & Fast-Acting Taps
Ever noticed how your washing machine, mixer taps, or dishwasher shut off instantly? That sudden stop creates a pressure wave, shaking the pipes and causing that telltale hammering sound. Over time, this can loosen pipes and lead to leaks—or worse, burst fittings.
High Water Pressure & Unsecured Pipes
If your building has high water pressure and no pressure-limiting valve, your pipes are taking a beating. Excessive pressure makes them vibrate, and if they’re not properly secured with pipe clips, they’ll rattle loudly. Left unchecked, this can lead to cracks or even complete pipe failure.
Old Pipes & Trapped Air Pockets
Older plumbing systems often have worn-out washers and corroded pipes, making them more prone to water hammer. Another culprit? Trapped air in the pipes. If your air chambers aren’t doing their job of absorbing pressure waves, a water hammer arrestor might be needed to keep things running smoothly.
Why Strata Buildings Have It Worse
Strata complexes have interconnected plumbing, meaning any pressure surge doesn’t just affect one unit—it ripples through the whole system. That’s why the banging can seem louder and more frequent in apartment buildings. If ignored, what starts as an irritating noise can turn into serious plumbing damage.
A professional plumber can assess the situation, install water hammer arrestors, and ensure your system meets Australian plumbing standards. If the noise persists, further adjustments may be needed to fixtures, valves, or even your hot water system to get things under control.
How to Detect Water Hammer Issues
Loud Banging or Knocking Sounds
If your washing machine, dishwasher, or mixer tap shuts off suddenly and you hear a sharp bang in the pipes, that’s a classic sign of a water hammer. This happens when water flow is abruptly stopped, sending a pressure shockwave through the plumbing. It’s often a symptom of high water pressure or faulty valves, and if ignored, it can weaken your pipes over time.
Pipes Vibrating Behind the Walls
Does it feel like your walls are shaking when the water’s running? Loose pipes or poorly secured pipe clips could be to blame. If the issue spreads through the building’s vertical risers, the vibrations can affect multiple units—making the problem even harder to ignore.
Leaks, Loose Joints & Even Burst Pipes
Over time, excessive water pressure and trapped air can put stress on your plumbing, leading to leaks or, in severe cases, burst pipes. Normally, air chambers or a pressure-limiting valve help absorb the impact, but if they fail, a water hammer arrestor might be needed to protect your piping system.
Unpredictable Water Flow & Hot Water Problems
Noticing irregular water flow or pressure changes? Trapped air pockets in the water pipes could be messing with your water supply. A faulty hot water valve or water heater can also contribute to pressure fluctuations, making your showers frustratingly unpredictable. If the issue persists, a licensed plumber can diagnose the root cause and recommend the best fix—ensuring everything meets Australian plumbing standards.
Ignoring Water Hammer? It Could Cost You More Than You Think
Damaged Pipes & Potential Bursts
Every time a water hammer occurs, it sends shock waves through your plumbing system. Over time, this can weaken pipes, loosen joints, and cause leaks. In severe cases, pipes can burst, leading to costly emergency repairs. Addressing the issue early can prevent major plumbing disasters.
Worn-Out Water Appliances
Water heaters, washing machines, and mixer taps all depend on consistent water pressure. Sudden stops in flow can damage their internal parts, shortening their lifespan and forcing you into costly replacements. Solenoid valvesand hot water valves are especially vulnerable, meaning your appliances could wear out much sooner than expected.
Higher Water Bills
Leaks caused by high water pressure, worn washers, and trapped air pockets don’t just waste water— they drive up your bills. If your plumbing system lacks a pressure-limiting valve or a water hammer arrestor, you could be paying more for water than you should.
Property Damage & Strata-Wide Issues
In apartment buildings, plumbing is often interconnected, meaning one unit’s water hammer issue can rattle the entire complex. Unchecked leaks can lead to mould, structural damage, and even safety hazards. Fixing the problem early helps protect your property and avoids costly strata-wide repairs.
How to Fix Water Hammer and Keep Your Plumbing Safe
Install a Water Hammer Arrestor
A water hammer arrestor acts like a shock absorber for your pipes, stopping pressure waves before they rattle your plumbing. This is especially helpful for appliances like washing machines, dishwashers, and mixer taps, which shut off water flow quickly and often trigger the problem.
Lower Your Water Pressure
High water pressure doesn’t just contribute to water hammer—it also puts unnecessary strain on your entire plumbing system. Installing a pressure-limiting valve can help stabilise water flow, protecting pipes, hot water systems, and fixtures from damage.
Secure and Repair Pipes Before They Get Worse
Loose pipes, worn washers, and leaking joints can make water hammers even worse. Securing pipes with proper clips and replacing damaged fittings can reduce vibrations and prevent further issues. If trapped air pockets are causing inconsistent water flow, clearing air chambers may be necessary to restore balance.
Upgrade Old or Outdated Plumbing
Older strata buildings often have ageing vertical risers, outdated hot water systems, and pipework that can’t handle modern water pressure levels. Upgrading to a more robust system that meets Australian plumbing standards can prevent future damage and improve overall efficiency.
Call a Professional Before the Problem Escalates
If water hammer keeps coming back, it’s time to get a licensed plumber involved. They can diagnose the root cause, install the right solutions, and ensure everything complies with regulations—helping you avoid costly repairs down the track.
Strata Plumbing Problems? Big Blue Plumbing Has You Covered
Struggling with noisy pipes, water hammer, or ongoing plumbing issues in your strata property? Big Blue Plumbing is here to help. Our experienced team knows the ins and outs of shared plumbing systems, high water pressure challenges, and the risks of leaving issues unresolved. Whether it’s stopping water hammers, upgrading outdated pipes, or fixing leaks before they turn into major repairs, we deliver solutions that last.
With years of expertise in strata plumbing, we provide tailored, efficient fixes that meet Australian plumbing standards. From installing water hammer arrestors to repairing burst pipes and ensuring steady water flow, we’ve got your building’s plumbing system covered.
Don’t wait for a minor issue to become a costly headache. Contact Big Blue Plumbing today for expert advice and fast, reliable service. We’ll keep your strata plumbing in top shape—giving property managers and residents the peace of mind they deserve.
