Any engineering subject consists of three aspects, namely: (1) Design, (2) Production and (3) Maintenance. This book deals with the use of pumps at site. It deals with the correct method of calculating the required head and discharges, according to the conditions such as domestic or agricultural or industries, the problems involved, such as proper selection of protection materials, such as stuffing box, mechanical seals, testing procedures fora load and cavitation tests on pumps, operation of pumps under different conditions and their remedies, if the pump is not operated properly. Apart from that, details about correct method of pump erection at site is also given.