Building roof's drain pipe structure

The utility model discloses a building roof's drain pipe structure, including the roofing body, evenly be provided with the courtyard in the eaves gutter of roofing body, the inner chamber bottom of courtyard is provided with pressure flow rainwater fill, and the bottom that the pressure flow rainwater was fought is connected with the one end of connecting pipe, and the other end of connecting pipe is fixed on the column pipe, and the one end of column pipe is passed through the connecting piece and is connected with the top of riser, and the bottom of riser is through being connected with out the family pipe. The beneficial effect of the utility model: this building roof's drain pipe structure is simple, and it has the courtyard to open in the eaves gutter through the roofing being the slope form to adopt pressure flow rainwater fill drainage system, make this drain pipe structure when discharging to the rainwater, the air admission drain pipe that can not adulterate, thus can protect the vacuum in the drain