The design of an integrated solar water heating system uses a single glazed cover does not keep the water heat at suitable temperature due to the heat loss occurred. This article is concerned about the effect of a double glass panel cover on the efficacy of the integrated solar water heater of an absorber made of metals with corrugated shape. A testbed was developed and used to conduct outdoor experiments. Two case scenarios were experimented, without flow rate and with a flow rate. The water temperature variation for both scenarios was observed and recorded for the 140 Liters storage tank. Due to the proposed thermal design enhancement, the temperature of the stored water had increased in both scenarios, compared to previous designs. In other words, the daily thermal efficiency got increased compares to previous designs as the heat losses were reduced due to the double-glazing cover. The results showed that domestic hot water appropriate for human use can be obtained using the proposed integrated solar water heater. Moreover, the present study in comparison with previous studies show increasing in daily thermal efficiency by 4.6%.