The joint of a manhole and a joint pipe is prone to have water infiltration and problems during dredging or maintenance of a pipe and is installed in many areas and complicated, so it requires thorough preparation for design and construction.So, it is appropriate to use products such as this connector, and when installing with a standard manhole with borehole or with a boring machine before connecting, be careful not to have any mortar or foreign substances in the joint pipe or the manhole then do a water infiltration inspection.