It’s very possible that you think high water pressure is a good problem to have. After all, what’s wrong with a lovely strong stream of hot water under the shower, or a bath that fills in minutes rather than dragging on forever? And for the gardeners with a big yard but a short hose, high water pressure is definitely a big tick.
So it’s true – nobody ever calls us complaining that their water pressure feels too satisfying under the shower. But after enough years crawling under houses and pulling apart fittings that have failed years before they should have, you start noticing a pattern – and it’s almost always the same one. The home with consistently strong pressure is often the home that has been quietly wearing out its pipes, seals and appliances much faster than it needs to – and long before anyone in the house has any idea it’s even been happening.
How it actually damages your plumbing
Every single fitting, seal, hose and joint in your home’s plumbing system was built to handle water moving through it at a certain force. It’s capped at 500 kPa under the Australian Standard – roughly the pressure of a small car tyre pushing through your pipes every time a tap turns on.
But once that force is consistently higher than intended, everything downstream is working harder than it was ever designed to:
- Rubber washers wear out sooner
- Joints get stressed every time a tap shuts off
- Appliances built with their own internal pressure limits start taking a beating they were never meant to absorb.
None of this happens overnight, and that’s really the whole issue. It’s a slow, cumulative kind of wear, which is exactly why so many people don’t connect the dots until something actually fails.
The 8 signs worth paying attention to
The good news is that none of these need a trained eye to spot – just a bit of attention to what your plumbing’s actually telling you.
1. Banging or knocking pipes
That sudden thud you hear through the walls when a tap shuts off, known as water hammer, happens when a strong flow of water gets stopped abruptly and sends a shockwave back through the pipes.
It’s more than just an annoying noise. Repeated water hammer stresses joints and fittings over time, and it’s one of the clearest signs that your pressure is running higher than it should.
2. Taps that hiss or screech
A tap that whistles, hisses or screeches when it’s turned on is often struggling to control a flow of water that’s simply too forceful for the fitting to manage smoothly.
It’s a small, easy-to-ignore noise, right up until the washer inside gives out from the constant strain and you’re left with a drip you can’t seem to fix no matter how many times you replace the parts.
3. A toilet that refills loudly and constantly
If your toilet cistern sounds like it’s working overtime every time it refills, or seems to be running more often than it should, high water pressure is frequently the culprit.
The fill valve inside is taking a beating every single cycle, and it tends to fail well before its expected lifespan when it’s constantly fighting against pressure it wasn’t built to handle.
4. Dishwashers & washing machines failing early
These appliances are engineered around a specific pressure range, and when the water hitting their internal valves and hoses consistently exceeds that range, components wear out faster than the manufacturer ever intended.
If you’ve replaced a washing machine inlet hose more than once, or a dishwasher’s stopped working well before its expected lifespan, pressure is worth ruling out before you blame the appliance itself.
5. Dripping taps that keep coming back
A tap that drips again shortly after you’ve replaced the washer is a strong clue that something bigger than a worn part is going on. Constant high pressure simply wears washers down faster than normal, turning what should be a once-every-few-years job into an ongoing, frustrating cycle of repairs.
6. Water stains or damp patches appearing
Small, hidden leaks at joints and connections are far more likely to develop when your system’s running under excess pressure, and they often show up first as a damp patch on a ceiling, a stain creeping up a wall, or a musty smell that seems to come from nowhere in particular.
By the time it’s visible, there’s usually been slow damage happening behind the scenes for a while already, quietly working away long before anyone noticed a thing.
7. A burst pipe or sudden flood
At the extreme end, sustained high pressure can eventually cause a devastating pipe failure, especially in older properties where the pipework wasn’t built with today’s stronger water pressure in mind.
This is usually the point where people finally call a plumber – and probably an emergency plumber, at that! It’s certainly a very bad sign to ignore!
8. Water bills that keep climbing
Excess pressure doesn’t just stress your fittings, it also tends to waste water outright, particularly through small leaks that haven’t been noticed yet.
If your water bill has been creeping up without any obvious change in how your household’s using water, pressure is genuinely worth having checked.
What causes it & what you can do about it?
If any of this sounds familiar, it’s fair to start wondering what causes high water pressure in house systems that seem to be doing everything else right.
Usually, it comes down to your connection to the municipal water supply, particularly if you’re on lower ground or close to a pump station – although ageing regulators and faulty valves can also be behind it.
So, how to fix high water pressure once you’ve confirmed that’s actually what’s going on? In most cases, the answer is a pressure limiting valve fitted where the water line enters your property, regulating the pressure down to a safer, more consistent level before it reaches any of your internal fittings. It’s a straightforward, one-time fix, usually completed in an hour or two, that protects everything downstream from the kind of slow, cumulative wear we see far too often once it’s already done the damage.
Not sure what your pressure’s doing?
If any of these signs sound familiar, Gold Coast Plumbing and Hot Water can test your pressure properly and fit a limiting valve if you need one, so your plumbing stops working harder than it should.
Call our friendly team, or book online, today.
