Best Way To Unclog Underground Outdoor Drainage Pipe. The first thing you need to do in order to fix a clogged underground drain system is to find out the location of the clog. Drainage consist of piping, tiling or an underground catch basin that collects excess water and funnels it away from your property, often to a termination point at the street, a drainage field, or some other safe runoff point.
Push the cable into the pipe until you feel resistance or hear the motor start to bog down. If you think a rainwater pipe is blocked, pour some water into the top of the pipe to see how it flows. Pull the tape out of the pipe and lay it along the known pipe route on top of the ground, with the location you marked at the point you inserted the fish into the pipe.
Feed hose into drain pipe to point of clog, secure hose in place with heavy object and turn water on full blast.
To prevent injury to face or eyes, water should not be turned on before water rooter is inside drain pipe. From the back of my house all the way to the very back of the yard, there is a drainage pond for a housing development. After you have finished cleaning the drain, pull the drain cleaner out. Push the cable into the pipe until you feel resistance or hear the motor start to bog down.