In a country like Iran, which faces water limitation, the effective use of irrigation water is of particular importance. Pessurized irrigation has been introduced to the farmers in Tehran province over the last few years as a tool for optimum water use.The present research aimed to identify the socio-economic factors inl1uencing the farmers initial acceptance of pressurized irrigation system, and the reasons for their dissatisfaction with the implemented ones. The research was carried out in two parts using field research techniques.The results of the first part showed that individual and social factors, such as age, experience, education, awareness, financial power, relationships in particular with extension workers, etc., inl1uenced the farmers acceptance of the system.The second part dealt with the reasons for the farmers dissatisfaction with the implemented pressurized irrigation systems. The lesson of experience was that the system should be introduced to a region with a prior study of the area-specific conditions, e.g. soils, climate and crops of that region. The farmers were most unhappy with the procedures of credit supply, the work of companies designing the system, and the quality of equipment provided to them. The critical opinion of the existing farmers in turn has lead to the resistance of the new farmers against the system.