How to Install a Dry Well

The pipe should slope toward the dry well ¼ inch per foot of run. A 2-foot level will show a ½ inch gap under one end when held level. Adjust the pitch by adding or removing soil under the pipe. When the pitch is set, attach the adaptor to the downspout using stainless-steel sheet-metal screws, then backfill around the pipe. Trim the opposite end if it's too long.