FAO supervisors demonstrating to local technicians the pressure testing of locally manufactured irrigation sprinkler systems to determine optimum efficiency output related to water, pressure and temperature. - - FAO Technical Assistance to AGRITEX: ZIM/91/005/G/01/12. The FAO complex situated at Hatcliff, outside Harare, is the only one of its kind in South Africa, designed for testing all types of locally manufactured irrigation systems. At present all systems undergoing testing, are Zimbabwean manufactured.