An experimental study on a passive solar distiller in the Tikrit city on (latitude line"34 36onorth, longitude line "45 43o east), and purpose of that study to raise the efficiency andproductivity of the solar distiller. And then design the monoclinic solar distiller and add reflectorplate and a solar concentrate. The Practical tests were conducted at a rate of every half-hourfrom the beginning of February to the beginning of the month of June. The study began bycomparing the solar distiller that contain the concentrates and without contain it. Then study theinfluence of adding coal and chemical solutions, like blue Thymol solution and bluebromophenol solution to see the additions effect on the productivity and efficiency of distiller,and also The study was conducted to see the effect of the water depth on the productivity ofdistiller with take four water depths within the basin are (2,1.5,1,0.5) cm of water. The tests wereconducted in weather conditions close. and the results of the study, That distilled added hisconcentrates improved its productivity by 46% and efficiency increases 43% with non-use ofconcentrates, and coal increased efficiency by 36% and productivity improved up to 38%, theaddition of blue Thymol solution increases the efficiency by 19% and productivity by 16%, aswell as bromophenol solution increase productivity by 23% and improve efficiency by 25%,when comparing the additions found that the best one is coal. Through the study of the depth ofthe water show that increases productivity and efficiency by reducing the depth of the water inthe basin distiller.