Copyright Goodheart-Willcox Co., Inc. Chapter 21 DWV Pipe and Fitting Installation 331 Nominal size (in) Laying length (in) C C C 45° ell 1 1/4 1 1/2 2 3 1/2 9/16 13/16 1 3/16 C C 90° ell 1 1/4 1 1/2 2 3 1 3/16 1 7/16 1 15/16 2 11/16 Nominal size (in) Laying length (in) A B C B A C Sanitary tee 1 1/4 1 1/2 2 3 4 1 1/8 1 7/16 1 7/8 2 7/8 3 13/16 13/16 15/16 1 1/8 1 7/16 2 1 1/8 1 7/16 1 7/8 2 7/8 3 13/16 C B A Wye 1 1/4 1 1/2 2 3 4 2 2 5/16 2 7/8 4 5 1/2 2 2 5/16 2 7/8 4 5 1/2 3/8 1/2 9/16 3/4 1 1/16 Goodheart-Willcox Publisher Figure 21-33. The laying length of common copper DWV fittings. Goodheart-Willcox Publisher Figure 21-34. Copper tubing is cut with light pressure on the cutting wheel. Goodheart-Willcox Publisher Figure 21-35. Ream the tubing to remove ridge left by cutting. A reamer blade is often built into the tubing cutter. Goodheart-Willcox Publisher Figure 21-36. Flux removes oxidation from copper tubing and prevents new oxidation from occurring during the soldering process. Distance Iron Pipe Is Turned into Standard Fittings Pipe size (in) Engagement (in) 1 1/4 1 1/2 2 1 1/16 1 1/16 3/4 2 1/2 3 3 1/2 1 5/16 1 1 1/16 Goodheart-Willcox Publisher Figure 21-37. Dimensions in the right-hand column are allowances to be added to face-to-face measurements of galvanized or black iron pipe. The allowance adjusts for the distance pipe is threaded into fitting.