A drain clog removal tool is adapted for removable attachment to a drain line and delivery of a pressurized flow of water therethrough. The tool includes an airtight coupler component having a first end adapted for attachment with a drain pipe and an opposite second end adapted for attachment with a pressurized water source. In one embodiment, a flexible tube is provided for connecting the pressurized water source with the second end of the coupler component for allowing airflow communication therebetween. The coupler component includes a check valve for permitting one way water flow (towards the drain line) and a pressure gauge for visually indicating the pressure within the drain line during operation of the drain clog removal tool.