Service to find source of leak in basement. Inspected and determined that leak was from an 1 1/4†heating line riser pipe behind a wall on the second floor which was pierced by a nail when molding was installed. Customer was shown the nail that was in the pipe causing the leak in the heating line. Pictures taken and included in invoice. Leak was temporarily stopped by clamping a rubber gasket around the section of damaged pipe. Customer was provided an estimate to return to repair the section of damaged pipe. Repair would consist of draining down the boiler/ replacing a section of the 1 1/4†copper pipe/ filling the boiler/ and purging out the air in line to allow heating line to operate.