DIY Doctor UK DIY Forums

are boiler flues desinged to keep rain water out of a combi.

hi dave, almost certainly so.
but put this post on either plumbing, gas or central heating forum and will get a more knowledgable response.
KB

I had a similar problem some years ago.
Water was flowing over the edge of the gutter in heavy rain and pouring into the exhaust pipe, that had been fitted with a slight backward and inwards slope instead of out and down.
Re positioned pipe problem solved.

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