A 1-percent slope means that it drops 1 foot vertically for every 100 horizontal feet. Example A 50-foot French drain that starts at the correct depth of 18 inches would be 24 inches deep at the ...

If you live in Washington, you know how intense and consistent the rainfall can be—especially in the fall and winter months.

The market for drainage systems includes products like channel drains, slot drains, trench drains, French drains, and components such as pipes, fittings, catch basins, and grates. The Drainage ...