Wherever the tubing has to turn at a pointy angle or branch out to a different section, Slice it and reattach it with tee or elbow connectors. Reduce the end on the tubing when you're completed; leave it open so you're able to flush it with water later on. http://water-filter-blog23445.canariblogs.com/fascination-about-blog-about-water-systems-10517367