This is the fourth edition of CSA B79, Commercial and residential drains and cleanouts. It supersedes the previous editions, published in 2005 under the title Floor drains, area drains, shower drains, and cleanouts in residential construction, and in 1994 and 1979.
This Standard specifies requirements for commercial and residential
(a) area drains;
(b) balcony drains;
(c) deck drains;
(d) floor drains;
(e) roof drains;
(f) shower drains;
(g) trench drains; and
This Standard covers the following subjects:
(b) design requirements for
(iv) cleanout covers;
(v) backwater valves; and
(vi) integral traps;
(c) tests for
(ii) backwater valve tightness;
(iii) sealing; and
(iv) corrosion; and
The figures included in this Standard are intended only to portray typical drain types and are not intended to restrict design or to be used for specification purposes.
In CSA Standards, 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; may is used to express an option or that which is permissible within the limits of the standard; and can is used to express possibility or capability. 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.
The values given in SI (metric) units are the standard. The values given in parentheses are for information only.