I am building a house on a lot that slopes from front to back. I have an engineered retaining wall running down the entire side of the house (approx. 90 ft.) and across the back (approx 100 ft.). There is a french drain set in gravel and cloth running along the retaining wall. There is plenty of fall for good drainage. I have my gutter drains running into a catch basin in the front. My question is this ... Can/Should I tie my catch basin into my french drain and let the water run down the side of the house and out the back of the retaining wall? Can a french drain leak water out even if gravity is moving the water through the pipe sufficiently?
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