Abstract: This paper presents the design of impeller and it’s performance describes under the prediction of theoretical and experimental observations of single-suction centrifugal pump. The designed pump is single stage centrifugal pump with closed type and it is capability deliver 0.015 m3/s of water at a head of 20 m. The designed parameters of impeller are 99 mm of inlet diameter and 250 mm of outlet diameter, by mean of vane angles at 20˚ inlet and 23˚outlet. The number of vanes is 6 and input shaft power is 6 hp.