12+ Drain Pipe Behind Retaining Wall Background. Taller walls may require more than one drain pipe to sufficiently relieve the hydrostatic pressure. When you are installing the landscaped earth, which the retaining wall is designed to hold up, you should fit in some pvc pipes.
Wall drains can also be used on barbecue islands. These will allow water to drain out of the earth, and prevent your soil from getting waterlogged and excessively heavy. Install a perforated plastic pipe behind the finished retaining wall to direct draining water away from the retaining wall to prevent the wall from falling under excessive rainfall.
It is important to provide adequate drainage for retaining walls whether the wall was built for landscaping purposes or as an external basement wall.
Let the pipe daylight beyond the edge of the wall, or run it into a french drain. A retaining wall is built to hold back a certain amount of soil. You are thinking about day lighting your foundation drainage that is near a stream to run into that stream? Let the pipe daylight beyond the edge of the wall, or run it into a french drain.