看过贵刊1997年第7期董华先生的《家庭自制水箱》一文,本人认为也可改进成如右图所示的管路,以供读者参考。该管路有以下特点:1.用水不必全部进水箱,外供及水箱供水管兼用;2.增加两个止回阀,可节省一趟进水或出水 Having read the article “Home Made Water Tank” by Mr. Dong Hua in the 7th issue of Guilin Magazine in 1997, I think that it can also be improved into the piping shown in the right figure for the reader’s reference. The pipeline has the following characteristics: 1. The water does not have to be completely filled into the tank, and both the external supply and the tank supply pipe are used concurrently; 2. The addition of two check valves saves one inlet or outlet of water.