Reducing Radon in New Construction of ANSI/AARST CCAH 2020 1 & 2 Family Dwellings and Townhouses 12 SECTION 501 ROUGH-IN PIPING FOR RADON CONTROL SYSTEMS 501.1 Piping. The radon control system piping that extends from the soil gas collection plenum to the point of discharge shall be rigid, non-perforated pipe in accordance with Sections 501.2 through 501.10. 501.2 Pipe size. The radon control system piping shall be not less than 3 inch [7.6 cm] I.D. 501.3 ABS piping. ABS pipe shall comply with ASTM D2661, F628 or F1488. The minimum pipe wall thickness shall be Schedule 40. 501.4 PVC piping. PVC pipe shall comply with ASTM D2665, F891, or F1488. The minimum pipe wall thickness shall be Schedule 40. Exception: Rigid, non-perforated PVC pipe meeting above ground drainage and vent pipe specified in codes 3 is an alternative to the material specified herein for use vertically within enclosed wall cavities. 501.5 Slope. Above ground piping shall have a slope of not less than 1/8 inch [3.2 mm] per foot [30 cm]. Piping shall slope downwards towards the suction point . Piping arrangements that could allow water to collect are prohibited. 501.6 Joints. Plastic pipe joints shall be solvent welded in accordance with Sections 501.6.1 and 501.6.2. Where disassembly of piping is required such as for removal of a fan, the joints shall be made with flexible couplings complying with ASTM D5926 or ASTM C1173. 501.6.1 ABS plastic pipe joints. ABS plastic pipe joints shall be solvent welded in accordance with the pipe manufacturer’s instructions with solvent cement conforming to ASTM D 2235. 501.6.2 PVC plastic pipe joints. The joint surfaces for PVC plastic pipe and fittings to be solvent welded shall be prepared with a primer conforming to ASTM F 656. PVC plastic pipe joints shall be solvent welded in accordance with the pipe manufacturer’s instructions with solvent cement conforming to ASTM D 2564. 501.7 Support. Above ground piping shall be supported by the structure of the building using hangers or strapping designed for piping support. Supports for horizontal piping shall be installed at intervals not exceeding 4 feet [1.2 m] and supports for vertical piping shall be installed at intervals not exceeding 10 feet [3 m]. 501.8 Protection against physical damage. Where pipes penetrate top or bottom plates of stud walls and the nearest edge of the hole is within 1 ½ inches [3.8 cm] of the face of the member, the pipe shall be protected by steel shield plates. Such shield plates shall have a thickness of not less than 0.0575 inches [1.463 mm] (No. 16 gage). Such plates shall cover the face of the framing member(s) where the plate is bored, shall extend not less than 2 inches above bottom 3 As point of reference, see the International Residential Code (IRC) as published by the International Code Council.