Avoid costly errors on French drain installation with advice from an experienced Professional..Pennsylvania Stormwater Management Manual Structural BMPs Structural BMP Criteria BMP Dry Wells French Drains A Dry Well, or French Drain, is a.Please use the service sign up sheet . and get into the schedule. Now is the best time to save and prepare for the rainy season! Please Note Due to recent rains, we .French Drains. French drains are underground water management and drainage systems developed and popularized by Henry French, a Concord, M.achusetts judge and .
Installing French Drains . Dig a trench along the outside of your footing. Lay the pipe on the virgin soil. Cover the pipe with at least inches of washed gravel. Lay filter fabric over the gravel to prevent any soil from clogging the pipe. Back fill the foundation with top soil back to its original grade height .