Gullies: Back-flow of waste water (NT VVS 041) Posted onNovember 25, 1985September 25, 2020Author Report #: NT VVS 041 Approved: November 1985 Download pdf Size: 37.35 KB Abstract This NORDTEST method is designed to determine whether the construction of the gully prevents back-flow of waste water to enter the gully with a normal back-flow in the drainage system. Categories
