csst

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    New Build - CSST & Air Valve (Pictures)

    Hello, Looking for a bit of advice before I go to my builder's plumber (still in warranty)... I live in a 2019 new-build property. Detached timber-frame two story house. I have gas central heating with the boiler (Vaillant EcoFIT sustain 830) in a cupboard on the first floor. We have...
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