polyethylene (32 inches) (PEX) pipe Cross-linked polyethylene/ 2.67 aluminum/cross-linked 4 (32 inches) polyethylene (PEX-AL- PEX) pipe CPVC pipe or tubing, 1 3 10b inch and smaller CPVC pipe or tubing, 11/4 4 10b inches and larger Steel pipe 12 15 Lead pipe Continuous 4 Polyethylene/aluminum/ polyethylene 2.67 4 (32 inches) pipe Polyethylene of raised 2.67 temperature (PE-RT) 10b (32 inches) pipe Polypropylene (PP) pipe or 2.67 10b tubing 1 inch and (32 inches) smaller Polypropylene (PP) pipe or 4 10b tubing, 11/4 inches and larger PVC pipe 4 10b Stainless steel drainage 10 10b systems For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm. a. The maximum horizontal spacing of cast-iron pipe hangers shall be increased to 10 feet where 10-foot lengths of pipe are installed. b. Midstory guide for sizes 2 inches and smaller. 308.6 Sway bracing. Rigid support sway bracing shall be provided at changes in direction greater than 45 degrees (0.79 rad) for pipe sizes 4 inches (102 mm) and larger.
polyethylene (PEX) pipe (32 inches) Cross-linked polyethylene/ aluminum/cross-linked polyethylene (PEX-AL- PEX) pipe 2.67 (32 inches) 4 CPVC pipe or tubing, 1 inch and smaller 3 10b CPVC pipe or tubing, 11/4 inches and larger 4 10b Steel pipe 12 15 Lead pipe Continuous 4 Polyethylene/aluminum/ polyethylene pipe 2.67 (32 inches) 4 Polyethylene of raised temperature (PE-RT) pipe 2.67 (32 inches) 10b Polypropylene (PP) pipe or tubing 1 inch and smaller 2.67 (32 inches) 10b Polypropylene (PP) pipe or tubing, 11/4 inches and larger 4 10b PVC pipe 4 10b Stainless steel drainage systems 10 10b For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm. a. The maximum horizontal spacing of cast-iron pipe hangers shall be increased to 10 feet where 10-foot lengths of pipe are installed. b. Midstory guide for sizes 2 inches and smaller. 308.6 Sway bracing. Rigid support sway bracing shall be provided at changes in direction greater than 45 degrees (0.79 rad) for pipe sizes 4 inches (102 mm) and larger.
308-ICC_PLUMBING_CODE_PIPING_SUPPORT.docx