In this communication, an attempt has been made to find out the heat transfer coefficients such as internal and external heat transfer modes and thermophysical properties such as dynamic viscosity, density, thermal conductivity, latent heat of evaporation and saturated vapour pressure for active solar distillation system. It is observed that the distillate output (the yield) increases significantly with the top cover cooling study. Double slope step type solar still of area 1 m2 is constructed using a single piece of mild steel. Acrylic cover with 10__ampersandsigndeg; slope ensures a very good transmission of solar radiation inside the still. The distillate water productivity is in the range of 1.758 litres to 1.805 liters per day for still performance study. Similarly the instantaneous efficiency for still performance study is in the range of 17.84% to18.25%.__ampersandsignnbsp;