UK trade guideControls & Valves 5 min readUpdated 9 July 2026

How to Service a Water Softener (UK)

Annual service on a Kinetico, Harvey or BWT twin-tank water softener. Salt, resin and injector.

KineticoHarveyBWTEcowater

Annual checks

  • Salt level — top up to full weekly.
  • Injector — descale in citric acid.
  • Resin — test capacity with hardness kit; replace at 10 years.
  • Brine tank — clean out sludge annually.

Frequently asked questions

Block salt or granular?
Kinetico and Harvey — block only. BWT and Ecowater — tablet salt. Never mix.
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