Illustration: Roof drain → secondary overflow (scupper). Sizing table based on rainfall intensity (e.g., Manila: 150 mm/hr design).
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Related search suggestions: (functions.RelatedSearchTerms) "suggestions":["suggestion":"National Plumbing Code of the Philippines PDF","score":0.9,"suggestion":"NPCP illustrated edition download","score":0.78,"suggestion":"Philippine plumbing code fixture unit tables","score":0.6] Illustration : Roof drain → secondary overflow (scupper)