Bury Your Gutter Downspout
Start laying your drain pipe by attaching a 90 degree angle pipe to the gutter downspout.
Bury your gutter downspout. Have your downspout extension and connector together then place on your gutter. Now time to screw them into place. Dig a trench about 6 inches wider than the drain pipe you plan to bury and dig the hole deep enough so that the. For the garage i used a downspout adapter without a leaf guard since there aren t trees close enough for that gutter to get clogged up.
Dig a trench along the desired route of the drain pipe. To do this i cut the black corrugated pipe added a t and aimed the pipe upwards to the downspout. Time to take off the old angle off the gutter downspout. Since my in ground pipe ran right past the garage i had the garage downspout dump in as well.
Then remove the angle connector. Repeat the similar procedure for the other end of the angle to connect it to the ground pipe. Inspect the ground above the buried downspout after the first two or three substantial rainfalls. Use a garden spade to cut.