Can I use softened water with a Vaillant 428 ecotec boiler. Thanks for your help. 
Vaillant 428 ecotec and softened water
- Thread starter Hornblower
- Start date
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I don't see why not, the Vaillant has a Stainless Steel heat Exch, so should not be harmed by softened water, contact Vaillant's technical Support Department for confirmation - but if the boiler was a combi variant the manufacturer's recommend a softener in hard water areas so that is where I base my opinion
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