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PLUMBING PIPING SYSTEMS Section 15400 15-1207 a. 1/2 -inch diameter at 6 -feet maximum b. 3/4 -inch and 1 -inch at 8 -feet maximum C. 1 -1/4 -inch and larger at 10 -feet maximum spacing M. Provide hangers or supports for horizontal and vertical cast-iron drainage pipe at every other joint, except that when the developed length between hangers or supports exceeds 4 feet, provide hangers or supports at each joint. Provide adequate sway bracing to prevent shear. 3.08 PIPING SYSTEM JOINTS: A. General: Provide joints of type indicated in each piping system. B. Cut all steel pipe and hard copper tubing by power hacksaw, a circular cutting machine using an abrasive wheel or in square end vise by means of hand hacksaw. Wheel cutters may be used for steel pipe provided that pipe shall have ends reamed to full inside diameter and beveled before being made up into fittings. Pipe shall have round edges or burrs removed so that a smooth and unobstructed flow will be obtained. C. Thread pipe in accordance with ANSI 132.1; cut threads full and clean using sharp dies. Ream threaded ends to remove burrs and restore full inside diameter. Apply pipe joint compound, Rector- Seal #5, on male threads at each joint and tighten joint to leave not more than 3 threads exposed. Teflon tape may be used on piping smaller than 2 inches. D. Use joint compound, same as specified for threaded pipe joints, on all cleanout plugs. E. Braze copper tube -and -fitting joints where indicated, in accordance with ASME 1332. F. Solder copper tube and fitting joints where indicated, in accordance with recognized industry practice. Cut tube ends squarely, ream to full inside diameter, and clean outside of tube ends and inside of fittings. Apply solder flux to joint areas of both tubes and fittings. Insert tube full depth into fitting, and solder in manner which will draw solder full depth and circumference of joint. Solder shall be 95 percent tin, 5 percent antimony and shall be used above grade only. Wipe excess solder from joint before it hardens. G. Mechanically Formed Tee Connections: In lieu of providing tee fittings in copper tubing, Contractor may, as an option, provide mechanically formed tee connections, providing they are in accordance with the following: 1. Size and wall thickness of both run tube and branch tube are listed by manufacturer of forming equipment as "Acceptable Application." 2. Height of drawn collar is not less than three times the wall thickness of run tubing. 3. End of branch tube is notched to conform to inner curve of run tube and dimpled to set exact penetration depth into collar. 4. Resulting joint is minimum of three times as long as thickness of thinner joint member, and brazed using B-CuP series filler metal. H. Mechanically Formed Couplings: In lieu of providing couplings in copper tubing, Contractor may, as option, provide mechanically formed couplings, provided they are in accordance with the following: 14