A simple methodology of design and construction of low-cost ejectors made from PVC was presented. Ejectors of nominal diameters of 25 mm and of 32 mm, with geometry similar to that of the conventional jet pumps ~Type A! and with different area ratios, were built and evaluated experimentally under various pressure and flow conditions. A more compact ejector without a mixing chamber, similar to the Venturi-type ejector ~Type B!, was
also built and evaluated. It was verified that the ejectors developed in this work present similar operation to that of the conventional jet pumps. All of the ejectors tested were able to operate with applied heads of more
than 15 m H2O and with Reynolds numbers larger than 3104. The Type A ejectors reached efficiency above 30% and the TypeB between one-third and half of that value. Further, the cost of these accessories was around half of that of the Venturi-type ejectors used to apply chemicals into irrigation pipelines, the least expensive now available in the local market