CSA B127.3:21

1 Scope 1.1 This Standard covers fibrocement Type 1 (Class 3000) and Type 2 (Class 4000) pipe and pipe fittings for installation in storm and sanitary drainage systems for drain, waste, and vent (DWV) inside and outside of buildings, above and below grade. 1.2 This Standard includes specifications for material, dimensions, crushing strength, chemical resistance, and joint tightness. Methods of marking to indicate compliance with these requirements are included. Recommended installation practice is given in Annex A. Suitability of material composition is given in Annex B. 1.3 The values given in SI units are the units of record for the purposes of this Standard. The values given in parentheses are for information and comparison only. All pipe sizes are shown as nominal pipe sizes (NPS). 1.4 In this Standard, “shall” is used to express a requirement, i.e., a provision that the user is obliged to satisfy in order to comply with the Standard; “should” is used to express a recommendation or that which is advised but not required; and “may” is used to express an option or that which is permissible within the limits of the Standard. Notes accompanying clauses do not include requirements or alternative requirements; the purpose of a note accompanying a clause is to separate from the text explanatory or informative material. Notes to tables and figures are considered part of the table or figure and may be written as requirements. Annexes are designated normative (mandatory) or informative (non-mandatory) to define their application.