Pressure supplied from the municipal network can vary because of demand, reservoir levels, maintenance, pipe failures, elevation and local infrastructure. Similar symptoms can also come from a fault after the property meter, so the boundary must be established carefully.
Before you worry
If neighbours are affected at the same time, a municipal issue becomes more likely. If only your property is affected, internal valves, leaks or pipe restrictions deserve closer attention.
How to recognise the problem
- Several nearby properties lose pressure together.
- Pressure is lowest at predictable peak times.
- Supply changes after municipal work or outages.
- The meter-side flow is weak before internal branching.
- Discoloured water or air appears after restoration.
Common causes
- High neighbourhood demand.
- Reservoir or pump constraints.
- Municipal pipe bursts or maintenance.
- Partially restored valves after work.
- Elevation and network design.
- A private-side fault that resembles a supply issue.
What you can safely check yourself
- Ask nearby properties whether they are affected.
- Check official municipal notices where available.
- Compare pressure at different times.
- Confirm the property stop valve is fully open.
- Document dates, times and symptoms.
What you should never do
- Do not tamper with the municipal meter.
- Do not install uncontrolled boosting directly from the supply.
- Do not assume the municipality is responsible without testing.
- Do not consume discoloured water until official guidance is clear.
When to call a plumber
Call a plumber when only your property is affected, pressure remains poor after municipal service returns, or a leak or restriction is suspected after the meter.
How professionals solve it
A plumber tests pressure and flow near the entry point and deeper in the property, checks valves and filters, and documents whether the restriction appears upstream or within private plumbing.
How to prevent it happening again
- Maintain private entry valves and strainers.
- Use compliant storage and boosting designs where justified.
- Repair private leaks promptly.
- Keep records of recurring municipal pressure patterns.
- Avoid unnecessary pipe alterations before diagnosis.
Frequently asked questions
Who is responsible for low pressure?
Responsibility depends on where the problem lies: before the property supply boundary or within private plumbing.
Can a plumber prove the issue is municipal?
Pressure and flow measurements can provide useful evidence, although the municipality controls its network.
Why is pressure worse in the evening?
Peak demand can reduce available network pressure in some areas.
Need help with a water pressure problem?
Tell us which outlets are affected, whether the pressure is high, low or unstable, and when the problem started so we can help arrange the right diagnosis.