Sewage slope

Slope norms: Ø40–50 mm — 30 mm/m, Ø110 — 20 mm/m, Ø160 — 15 mm/m. Too much slope is equally bad: water outruns solids and leaves them in the pipe. Minimum fill is 0.3 of diameter for self-cleaning. Access/inspection at every >45° turn and every 15 m.