Ohh I see what you mean. I will not have to touch the retaining wall at all, difficult to explain with words but I'll send a pic tomorrow. Yeah, my structural engineer (the good one) was onsite and we explicitly discussed where pipes will run, took measurements of the retaining wall etc thanks for the concern!!!I was asking as it will require de constriction of part of the wall to run plumbing to it. I do alot of retaining wall work with my installs. Theres alot to consider when introducing a surcharge above an existing wall. Be sure that any layout plans/designs by the engineer include a site visit to review your existing walls.
Of course. Obviously I have not been able to try anything but so far so good.Make sure to save the pics just in case you missed a bent or messed up piece.