Abstract: A drain unclogging system includes a drain pipe valve installed on a drain pipe of a drain system, a T connector connected to a water supply valve of the drain system for splitting a water supply into two water supplies including one that supplies water to the sink and the other one that supplies water to the drain unclogging system, a high pressure hose, a high pressure valve for connecting the water supply to one end of the high pressure hose, and a high pressure nozzle for connecting the other end of the high pressure hose to the drain pipe at a location near an U arch section of the drain pipe. The drain pipe valve is operable to be opened to facilitate a normal operation of the drain system or closed to stop water from back flowing to a sink of the drain system during an unclogging operation. The high pressure valve is operable to be turned on for supplying water to the drain unclogging system or turned off for prevent water from entering the drain unclogging system.