The present invention relates to a method using water turning index for water apparatus and turn it, do not use the water meter and even, it does require tedious installation, such as a lake for water twirl through the ground and the installation and dismantling of the amount of sewage much simpler and will also conduct a large pipeline that can turn water. ; The index system for water turn of the present invention, the sewage pipeline has the body shape of the distribution as a front end that is connected to the outlet, the lake outflow pipe for water turn, are installed on the outlet pipe circumferential surface air is injected When the expansion pipe and the inner wall and the air-tight to seal the tube through the outlet pipe, outlet pipe and is provided at the end, and comprises a switching means for opening and closing the entrance to the rear end of the outlet tube, ; This invention Turning the water in the process, with the upstream manhole between which from the upstream side toward the downstream side are sequentially connected to the pipeline, the intermediate pipe, a downstream pipe, sewer is to close the outlet of the upstream channel to the outlet as possible provided outlet state step, through the internal inertia pipeline is constructed, including the steps for installing the lake for water turning to connect the outlet and downstream pipeline.
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