Abstract: The disclosed Drain Apparatus with Branch Tube and Valve is a cylindrical tube consisting of the outer tube (1) and inner tube (13). The bottom part of the outer tube (1) has 2 locks (4) (5) to prevent the movement when inserting the inner tube (13) into the outer tube (1). The upper part of the inner tube (13) has a hole (8) of similar size to the branch tube (2), branching from the outer tube (1), to allow high-pressure water or air flow through the inner tube (13). Above the hole (8), a valve (6) is mounted inside the inner tube (13). In its normal position, the valve (6) will perfectly close the end of the hole (8). When high-pressure water or air flows in, the valve (6) will be pushed upwards to close the upper opening. The water or air will flow along to push blockage and waste out of the drain.