The statements below are direct from the manufacturer's warranty and can be read in full by clicking the links below.
Worcester Bosch Warranty & Guarantee.
4.2.7 Damage to the Product as a result of water quality or other external factors causing scale, sludge, blockages or associated costs of rectification.
9. Any damage caused by hard water scale deposits or sludge resulting from corrosion.
https://www.baxi.co.uk › faqs › gen... General boiler warranty information
Vaillant Warranty & Guarantee.
15. If any failure is caused by contaminated water in the boiler (e.g. blockages, or influences of flux residues, iron oxides, limescale, sludge etc.) the engineer’s visit becomes chargeable at the prevailing rates.
d. To de-scaling or other work required as a result of hard water scale deposits or from damage caused by aggressive water or sludge resulting from corrosion. Indications that such work may be required include a noisy boiler, cold spots on radiators, sludge in pipes and poor circulation of the central heating system.
https://idealheating.com › I...PDF
Viessmann Warranty & Guarantee.
To be clarified.
Glow Worm Warranty & Guarantee.
15. If any failure is caused by contaminated water in the boiler e.g. blockages, or influences of flux residues, iron oxides, limescale, sludge etc. the engineer’s visit becomes chargeable at the prevailing rates.
