Sand and leaves got carried away by waterflow.

沙子和树叶被水流冲走了.

If a reducing tee is not available and a standard tee is used, install a face bushing in top opening to keep waterflow indicator as close to tee as possible.

如果没有异径三通接头而采用标准三通接头，在顶部开口处安装一个结合面套管，使得水流指示器尽可能靠近三通接头。