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    Vaillant Eco Plus 624 and dreaded F22 - but where are the valves?!

    I'm a stay at home mum. I know NOTHING about boilers, but I've been reading lots of threads as I've worked my way through two glasses of red. My problem is this: I have no butterfly valves. I can see what I think must be two sets of valves on each boiler (I have 2) but can't see how I would...
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