What is the minimum trap diameter required for a shower bath?

The minimum trap diameter required for a shower bath is 51 mm. This size is specified to ensure proper drainage and to minimize the risk of clogs or blockages that can occur with smaller diameters. A trap of this size allows for adequate flow of wastewater, while maintaining a water seal to prevent sewer gases from entering the living space.

A 51 mm trap is also compatible with standard plumbing systems and provides a balance between efficient drainage and effective trap function. It ensures that any debris or sediment that may wash down the drain is adequately handled without creating backups. Overall, this size standard is part of plumbing codes to ensure safety and functionality in residential and commercial installations.