Waterlogging building underground tank is prevented in self -interacting

The utility model provides a waterlogging building underground tank is prevented in self -interacting, lies in building ground below for collect storage building rainwater, near the low level of the municipal rainwater pipeline well in outlet pipe intercommunication is passed through to the lateral wall lower part in pond, is connected with the electronic on -off valve of check valve and low level in the outlet pipe, and the high position of a municipal rainwater pipeline well of inlet tube intercommunication is passed through on the lateral wall upper portion in pond, is connected with high -order electronic on -off valve in the inlet tube. The utility model discloses a pond is in rainwater season, and the building rainwater that compiles passes through the outlet pipe and directly arranges municipal rainwater pipe network, and the capacious part in pond is vacant, and the pond can be gone into through the inlet tube backward flow to the positive surge of municipal administration rainwater pipeline well duri