PROCEDURE Manually Cutting Cast-Iron Pipe A manual method of cutting cast-iron pipe gives good results if these steps are followed: 1. Mark a cutting line all the way around the pipe with yellow keel. 2. Saw a 1/16″ to ⅛ ″ deep groove on the line around the pipe. 3. Roll the pipe and tap on it with a hammer near the groove until it breaks. On extra heavy pipe, use a mallet and cold chisel to complete the cut after sawing the groove. Work around the groove until the pipe fractures. Joining Pipe No-hub cast-iron pipe is joined with a neoprene gasket and a stainless steel clamp. Slip Cutting Cast-Iron Pipe Cast-iron pipe is generally cut with a compound lever or hydraulic pipe cutter, Figure 19-46. This tool squeezes the chain tightly around the pipe. Small cutters in the chain bite into the pipe until it fractures. A B The Ridge Tool Co. Figure 19-42. Two types of power driven threading machines. A—Portable threader. B—Bench-mounted threading machine. Goodheart-Willcox Publisher Figure 19-43. Teflon™ tape can be applied to seal threaded joints. Goodheart-Willcox Publisher Figure 19-44. Fittings are securely tightened with a pipe wrench. Goodheart-Willcox Publisher Figure 19-45. Add the appropriate allowances to the face-to-face measurements of cast-iron pipe. Allowances for Hub Depth Pipe size (in) Engagement (in) 2 3 4 2½ 2¾ 3 5 6 8 3 3 3½ Chapter 19 DWV Pipe and Fitting Installation 319 Copyright Goodheart-Willcox Co., Inc.