Heiler, Terence David2024-10-212024-10-211968-07https://hdl.handle.net/10182/17751The New Zealand Agricultural Engineering Institute (NZAEI) have recently conducted a series of hydraulic performance tests on trough valves of various designs submitted free of charge by manufacturers throughout New Zealand. The results of these tests are discussed and presented in this paper. The selection of valves tested represents the more, common types used for water supply systems in New Zealand, and as new valves are obtained or developed similar tests will be conducted to bring design information up to date.5 pages© NZAEItrough valvesfarm water suppliesReportANZSRC::401209 Hydrodynamics and hydraulic engineeringANZSRC::300201 Agricultural hydrology