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  1. M

    Airbrick in 1950 house opening to a vitrified clay pipe

    Hi, I am sure someone here has seen it before and could explain this to me. I recently unblocked (blocked by some insulation) an airbrick in 1950s house , which 'opens' onto a vitrified clay pipe under concrete kitchen floor. The pipe hoes for about 3 m all the way to the front room (where the...
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