Gullies: Self-evacuation (NT VVS 040) Posted onNovember 25, 1985September 25, 2020Author Report #: NT VVS 040 Approved: November 1985 Download pdf Size: 38.31 KB Abstract This NORDTEST method is designed to determine whether the water seal in the gully trap can be reduced or be broken due to a syphon effect which can occur in a normal installation. Categories
