Water drainage device for pressure relief valve of water heater and construction method for water drainage device

The invention discloses a water drainage device for a pressure relief valve of a water heater and a construction method for the water drainage device. The water drainage device comprises a water drainage tube and a water outlet tube, wherein the water drainage tube is arranged inside a wall body; the first end part of the water drainage tube is connected to a valve; the second end part of the water drainage tube is connected to a floor drain; the water outlet tube, the valve and the water drainage tube communicate with a water inlet of the water heater; and the tail end of the water drainage tube tilts on the horizontal plane. The water drainage device can effectively treat water drained by the water relief valve of the water heater, and also can place a water relief tube on a hidden position. 本发明公开了一种热水器泄压阀排水装置及其施工方法，包括：排水管，排水管设于墙体内部，排水管的第一端部连接阀门，排水管的第二端部连接地漏；出水管，出水管、阀门和排水管均连通于热水器的出水口；排水管的末段倾斜于水平面。本发明能够将热水器泄压阀排出的水进行有效的处理，且又能把泄水管放置在隐蔽位置。