I know I don’t have French drain but I had 3 drains installed in my backyard that drain to the front curb. I had shelly’s landscaping from northbrook do the work. He knew exactly what to do to alleviate my backyard flooding. Other landscapers wanted to draw electricity and put in pumps. Others said there was nothing they could do but raise the level of the ground. Shelly came, looked at the water, said what needed to be done. He said he installs the drains all the time. Had it done years ago and no more backyard flooding or standing water!