🚰 Plumbing Code Lookup

Your quick reference for the National Plumbing Code of the Philippines — water-supply & drainage fixture units, water & drainage pipe sizing, minimum slopes, vent sizing, traps & trap seal, fixture pipe sizes, septic & sewer basics, storm drainage, and the key design formulas. Search, filter, and export to PDF. Free to use.

⚠️ Curated reference — the National Plumbing Code of the Philippines (NPCP) is based on the Uniform Plumbing Code; the values here are the widely-taught standard figures. Always verify against the official NPCP edition your course/board uses and your professor's notes before using them in a design or exam answer. Fixture-unit and pipe-sizing tables vary by edition.

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Tip: tap a category header to collapse it. Fixture-unit and pipe-sizing tables vary by NPCP edition and by private/public use — this is a study aid, not a substitute for the official code.