38h. A running trap with clean-out shall be installed in the waste line.
39 to 41. Same as for Class 1.
41a. Waste and water pipe, in connection with wet separator and jacket, except waste pipe below basement floor, to be standard galvanized wrought-iron pipe or steel screw-jointed pipe free from burs. Waste pipe below the basement floor is to be best grade, “extra heavy” cast-iron pipe, with lead-calked joints.
42 to 45. Same as for Class 1.
45a. Fittings on water lines to be standard galvanized beaded fittings.
45b. Fittings on waste line above basement floor line to be galvanized recessed screw-jointed drainage fittings and those below basement floor to be “extra heavy” cast-iron with hub joints.
46 to 50. Same as for Class 1.
50a. The exhaust pipe is to be fitted with an approved first-class exhaust muffler not less than 12 in. in diameter and 60 in. high, closely riveted and constructed of galvanized iron not less than ¹⁄₈ in. thick, and in event an exhauster requiring lubrication is furnished, this muffler is to be arranged so that it will also be an efficient oil separator. Drip connection to be arranged at bottom of muffler.
51 to 56. Same as for Class 1.
56a. Tool Cases. Furnish .... approved hardwood cabinet-finished cases for cleaning tools. Each case to be made as light as possible and of convenient form for carrying by hand and provided with a complete set of cleaning tools, each securely held in its proper place, and fitted with lock and key, clamps and conveniently arranged handles.