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Plumbing advice

Common Causes of Low Water Pressure

Low water pressure at one tap or the whole house? Common causes, simple checks you can do and when a plumber should investigate.

Plumber checking pipework under a kitchen sink

One fixture or the whole house?

If low pressure affects one tap, the cause is usually local: a blocked aerator, worn cartridge or partly closed isolation valve. If the whole house is affected, look at the main stop tap, pressure-limiting valve, a leak or the supply itself.

Simple checks

  • Unscrew and clean the tap aerator
  • Check the main stop tap is fully open
  • Ask neighbours whether they have the same issue
  • Check for leaks using your water meter

Hot water only?

If only hot water is weak, the issue may be with the hot water system, its valves or the tempering valve.

When to get help

Persistent low pressure can indicate corroded pipes or a hidden leak. A plumber can test pressure and find the cause.

Related services

This article is general information only. For advice about your property, speak with a licensed plumber.

Need a plumber around Banora Point or Tweed Heads?

Call A4plumbing to talk through the problem, or send a quote request with photos and we'll get back to you.