Abstract: This paper presents the design of impeller and casing of single-suction centrifugal pump for clean and cold water. Type of pump is single stage centrifugal pump with closed impeller and it can develop a head of 20 m and deliver 0.015 m3/s of water. The designed impeller has 99 mm inlet diameter, 250 mm outlet diameter, 20° inlet vane angle and 23° outlet vane angle. The number of vanes is 6 and input shaft power is 6 hp.