What minimum distance should a gully trap be from the water level in the drain according to the regulations?

A gully trap should be located at a minimum distance of 600 mm from the water level in the drain according to regulations. This distance is critical to prevent backflow or contamination from sewage or wastewater into the building. The gully trap acts as a barrier, capturing solids and preventing them from entering the drainage system while allowing for the free flow of liquids.

Maintaining a distance of 600 mm ensures that the gully trap functions effectively by providing enough elevation to mitigate the risk of backwater flooding. Furthermore, this height helps to maintain an appropriate air gap, which is essential for preventing the intrusion of odors and gases from the sewage system into the living space.

This regulation reflects best practices in drainage design to ensure health and safety standards are upheld, protecting both the plumbing systems and the occupants' wellbeing.