flux used for making joints shall be :'50 Streamline solder and flux or equal. f. All Fittings in Conper Water Service lines shall be red brass compression type fittings, conforming to Ameri- can Standards Association Standards - A l10,2-1936, g. All Brass fittings shall be 1254, 85% cast red brass, conforming to Federal Specification \WW-P-l.06. h. All Plastic fittings shall be I.P.S, Mills Plastic nade of Saran, i. Substitutions. Aluminum fittings may be substi- tuted for plastic pipe fittings, upon direction of the ungineer, when plastic fittings are not available. 19-15. VALVES: services, Provide shut-off valves in all main water kach water closet shall be provided with a straight stop. Valves shall conform to Federal Specification "iW-V-5la or WI-V-5l. 19-15, MAKING UP PIPE: a. Cleaning; and all scale, All pipe shall be carefully cleaned sand, dirt, etc., removed before installation. 6b. Joints in Cast Iron soil pipe shall be standard caulked joints, madeby first packing the joint tight with oakum, filling to the top with molten lead and caulking tight. c. Threaded Joints; All threads on screwed pipe shall be cut with sharp clean dies full thiclmess of the die and so that not more than two threads are left exposed on the pipe when joint of all threaded taper reamer so smooth. Joints is made up in the fitting or vaive. The ends pipes shall be reamed out full size with long as to be partially bell-mouthed and perfectly in all screwed steel or brass piping shall be made with red lead and boiled linseed o11 completely covering the male thread, d. Joints in Aluminum piping shall be made with "Alcoa" thread Iubricant used on the male thread. 8. Solder Joints: In making solder joints in copper tubing the tubing and fitting shall be thoroughly cleaned with sand paper, sand cloth, or steel wool, after which a thorough coating of paste flux shall be applied. Tubing shall be cut square and all burrs removed, Tube shall fit snugly and 19-6