Here are some photos of my Torpedo tube rebuild. You an see how the cockpit scuppers are glassed right onto the tube. One shows the kind of GRP tube we used. One shows that we still need to connect the new torpedo tube to the collection manifold with rubber hose. I did not replace the PVC collection manifold which is forward of a bulkhead. That manifold receives all drainage (except the cockpit scuppers) and then drains with one pipe/hose into the torpedo tube. The boat's hull is going to be painted so this was the time to do the rebuild.