How To Unclog Underground Drainage Pipe. You should be able to. Using a spade (shovel), cut small patches of sod out and dig down every 6 feet or so.
Draw a mark on the hose with a boom and remove the hose. 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. Vigorously work the plunger up and down several times before quickly pulling it off the drain opening.
Then, pull it through the pipe from the downstream end.
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. Water jetting is now used broadly and is often the recommended technique for general underground outdoor drainage pipe cleaning, maintenance, and the removal of debris. Partially fill the sink with water, then start plunging. Attach a garden hose to a water source.