IS 10418 covers UPVC SWR (Soil, Waste, Rainwater) pipes for building drainage — the standard plastic drainage pipe used inside Indian buildings. Type A (heavy duty) for soil stacks and multi-storey. Type B (light duty) for waste and single storey. 110mm is the standard soil pipe size.
Specification for unplasticized PVC pipes and fittings for soil and waste discharge (drainage) inside buildings.
Key Values
Standard soil pipe110mm Type A
Standard waste pipe75mm Type B
Standard rainwater75mm or 110mm
Practical Notes
! 110mm Type A is the standard soil pipe for WC connections in multi-storey buildings.
! Type A (heavy duty) for soil stacks (carrying WC discharge) and multi-storey buildings.
! Type B (light duty) for waste stacks (basin, kitchen), rainwater, and single storey drainage.
! UPVC drainage pipes should NOT be exposed to sunlight — UV degrades PVC. Cover or paint exposed sections.
! Maximum hot water temperature 60°C — do not discharge boiling water directly into UPVC pipes.