The next position for this joint is to have the branch pipe horizontal and the run vertical. The materials, tools and preparation for this joint are the same as for the preceding ones. The supporting and wiping differ a little.
One end of the run is placed on the catch pan. The other end is held in place the same way as the branch was held in the preceding joint. If the pictures of this joint are carefully looked over, the methods employed to hold the pipe will be readily noted. The branch is best held by inserting one end of a bending iron in the bore of the pipe and placing the other end of the iron on a brick built up to the right height. The iron should be weighted to keep the joint from swaying.
The solder is now dropped on the branch as in the round joint, and splashed on the vertical run as in the upright joint. Sufficient solder is put on the joint to keep the edges covered with hot solder. Solder is worked around the joint until all parts of it are thoroughly heated and the solder works easily, then all the edges are wiped clean. The top half is then wiped evenly and the bottom half wiped to match the top half. A cross wipe in front completes the joint. When this cross wipe is made on any joint, a thick edge of solder must not be left. The edge must be wiped clean. This joint should be wiped first with the branch pointing to the right and then with the branch pointing to the left. It will take the beginner some time to master these branch joints, for not only must they be wiped symmetrically for the sake of appearances, but they must be wiped while the solder is hot to secure a tight joint. A joint that is wiped with solder that is too cold will be porous and will leak when put under pressure. With care the same pipe can be used throughout for all the positions of this branch joint.