This standard covers the requirements for materials, dimensions, construction, and finish of copper alloy waste fittings used in sanitary appliances like wash basins and sinks. It establishes uniform threading and sizing to ensure leak-proof and interchangeable plumbing connections.
copper alloy waste fittings for wash basins and sinks
Quick Reference Values
Nominal size for wash basin waste fittings32 mm
Nominal size for sink waste fittings40 mm and 50 mm
Thread designation for 32mm fittingG 1 1/4
Thread designation for 40mm fittingG 1 1/2
Practical Notes
Check thread compatibility (typically BSP threads per IS 2643) when coupling the waste fitting with plastic or metal bottle traps.
Ensure back-nuts are adequately tightened but not over-torqued to avoid deforming the flange or rubber washer, which can cause slow leaks.