High water pressure can feel convenient at a tap, but it places continuous strain on fittings, valves, flexible connectors, geyser components and appliances. Pressure spikes can also cause noise and repeated leaks.
Before you worry
Strong flow alone does not prove the pressure is excessive. Pressure should be measured because pipe size and outlet design can change how forceful the water feels.
How to recognise the problem
- Banging or vibration when taps close.
- Frequent failure of washers, valves or flexible hoses.
- Geyser valves discharge excessively.
- Toilet cisterns fill noisily or overflow.
- Leaks recur at fittings and appliance connections.
Common causes
- High municipal supply pressure.
- A failed or incorrectly rated pressure reducing valve.
- Thermal expansion in a closed system.
- Booster pumps set too high.
- Pressure surges when valves operate quickly.
What you can safely check yourself
- Note when noise or leaks occur.
- Check several outlets for unusually forceful flow.
- Look for valve discharge without obstructing it.
- Arrange a proper gauge test rather than relying on feel.
What you should never do
- Do not tighten leaking fittings repeatedly without checking pressure.
- Do not plug geyser or safety discharge pipes.
- Do not adjust sealed regulators without the correct procedure.
- Do not ignore repeated hose or valve failures.
When to call a plumber
Call a plumber when pressure-related leaks recur, water hammer is severe, geyser valves discharge continuously or appliance connections fail.
How professionals solve it
The plumber performs static and dynamic pressure tests, checks pressure-reducing and expansion components, reviews pump settings and inspects damage. Correct regulation is installed or serviced and the system is retested.
How to prevent it happening again
- Maintain pressure-control valves.
- Use correctly rated fittings and appliance hoses.
- Investigate water hammer early.
- Set booster pumps within design limits.
- Replace damaged components after pressure is corrected.
CUSTOMER QUESTIONS
What pressure is too high?
Acceptable pressure depends on the system and components. It should be measured with a gauge and assessed against the installation and applicable requirements.
Can high pressure burst pipes?
Yes. Continuous excess pressure increases stress and can contribute to failures, especially where pipework or fittings are already weak.
Will a pressure reducing valve solve water hammer?
It may help if pressure is excessive, but fast-closing valves or poor pipe support may also need attention.
What are common symptoms of high pressure?
Banging when taps close, frequent washer or hose failures, excessive geyser valve discharge, noisy cistern fill, and recurring leaks at fittings.
What causes high pressure at home?
High municipal supply, a failed or wrong-rated PRV, thermal expansion in a closed system, booster pumps set too high, or pressure surges when valves close quickly.
What can I safely check myself?
Note when noise or leaks occur, compare force at several outlets, watch valve discharge without blocking it, and arrange a proper gauge test rather than relying on feel.
What must I never do?
Do not keep tightening leaking fittings without checking pressure, plug safety discharges, adjust sealed regulators without the correct procedure, or ignore repeated hose failures.
When should I call a plumber?
When pressure-related leaks recur, water hammer is severe, geyser valves discharge continuously, or appliance connections keep failing.
How do professionals fix high pressure?
They run static and dynamic pressure tests, check PRV and expansion components, review pump settings, install or service correct regulation, and retest the system.
Can Plumb A Nator help with high water pressure?
Yes. Contact the team for pressure testing, PRV assessment and practical protection of your plumbing across Gauteng service areas.
Need help with high water pressure problems?
Send details about high water pressure problems and our team will recommend the most appropriate service.