Stack sizing and gradients to EN 12056, acoustic performance measured the way EN 14366 actually measures it, ring-seal against solvent weld, traps, backflow valves and vent terminations.
A supplier sends you “12 dB(A), tested to EN 14366.” That sentence is missing four things a specifier needs, and without them the number cannot be…
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Search “q-trap plumbing” and you get the same answer from a dozen pages: P, Q and S traps are classified according to their shape. That sentence…
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The design boundary in one image: everything above and within 1 m of the building is EN 1329 territory; the buried run beyond it belongs to…
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A PP drainage pipe specification fails inspection for one of two boring reasons: the spec cites a standard edition that no longer exists, or it treats…
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