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2026-02-04

How to Descale a Kettle... and Your Whole Plumbing System

Most of us know to descale a kettle every so often, but limescale builds up throughout your entire plumbing and heating system in Swindon's moderately hard water area, not just in visible appliances.

Descaling a kettle (the quick version)

Fill with equal parts water and white vinegar (or a shop-bought descaler), leave for around an hour, then boil and rinse thoroughly several times before using again for drinks.

Where else limescale builds up

  • ✓ Inside your boiler's heat exchanger, reducing efficiency over time
  • ✓ Around showerheads and tap aerators, restricting flow
  • ✓ Inside pipework, gradually narrowing the internal diameter
  • ✓ On immersion heater elements in hot water cylinders

What actually helps long-term

Removable fittings like showerheads and tap aerators can be descaled the same way as a kettle. For the wider system, a scale reducer fitted at your incoming water supply reduces the rate at which new limescale forms throughout the property, and periodic boiler servicing catches scale-related efficiency loss before it causes a breakdown.

If your boiler seems less efficient than it used to be, our servicing team can check for scale-related issues.

Need help now?

Our Swindon plumbing team is available 24/7.

Call 01793 000 000