This code of practice outlines the requirements for materials, jointing, installation, and testing of plastics-based sanitary plumbing systems, including soil, waste, and vent pipes. It aims to ensure efficient and hygienic conveyance of discharge from appliances within buildings.
Provides a code of practice for the selection, installation, and use of various plastic materials in sanitary plumbing systems.
Quick Reference Values
Minimum gradient for 100 mm drains1 in 100
Minimum water seal depth for traps50 mm
Maximum spacing for horizontal 110 mm uPVC pipe supports1.0 m
Minimum size of soil pipe100 mm
Water test pressure head2.5 m at highest point
Water test duration30 minutes (minimum)
Practical Notes
Although this standard has been withdrawn by BIS, its principles are fundamental and widely incorporated into newer codes like IS 13592 and the National Building Code (NBC). Always refer to the latest NBC for current practice.
Pay close attention to support spacing for horizontal pipe runs to prevent sagging ('belly'), which leads to blockages and poor flow.
Proper jointing with solvent cement is critical. Ensure surfaces are clean, dry, and properly primed before application to prevent future leaks.