This paper presents the concept of “APPLICATION OF RACK & PINION IN PEDDLE OPERATED WATER TAP”mainly carried out for saving excess uses of water in some basic activities like hand washing, shaving, washing utensils etc. the water is using with high rate in every field of works. So the universe has major problems of water crises in these days, which is graduallyincreases with the time.This problem will be main cause for disappearing of human races, animals, trees etc. Today some ideas is in demand but these ideas is very expensive.Theseideas is not affordable by every person.People wants save water in low effort in minimum expenditure.So in this project named as APPLICATION OF RACK & PINION IN PEDDLE OPERATED WATER TAP is used to operate the water tap for some basic activities like hand washing, brushing, shaving washing utensils etc.In above activities we can save the excess water by pressing and depressing to peddle with the help of RACK & PINION over the water tap. This project is very cheap and the maintenance cost is also very low. This project works on the rack and pinion principal which means “the translation motion of the rack is transfer into the rotary motion of the pinion”. In this project, the peddle is bounded with the springs and one springs is attached with peddle. When peddle press the spring allow to rack to moves up and then pinion rotates, and when it depresses then system takes its original position.