This is the tenth edition of CSA B137.6, Chlorinated polyvinylchloride (CPVC) pipe, tubing, and fittings for hot- and cold-water distribution systems. It supersedes the previous editions published in 2017, 2013, 2009, 2005, 2002, 1999, 1996, 1983, and 1971.
While earlier editions of this Standard were published as part of the CSA B137 Series, Thermoplastic pressure piping compendium, the ninth edition was reissued as a stand-alone Standard in January 2019. The compendium format has been discontinued.
This Standard is to be used with the 2020 edition of CSA B137.0, which provides requirements and test methods that are common to some or all of the Standards of the CSA B137 series.
The major changes in this new edition are the following:
a) addition of SDR 13.5 and SDR 21 sizes for use only in cold-water distribution and water service systems at a maximum working pressure of 2170 kPa and 1380 kPa, respectively, and a maximum working temperature of 23 °C;
b) addition of Note 2) to Clause 1.1 for the exclusion of venting of combustion gas applications; and
c) revision to fitting marking requirements in Clause 7.2.2.
This Standard has been developed in compliance with Standards Council of Canada requirements for National Standards of Canada. It has been published as a National Standard of Canada by CSA Group.
This Standard covers chlorinated polyvinylchloride (CPVC) pipe, tubing, and fittings in the following sizes and uses:
a) standard dimension ratio 11 (SDR 11), and Schedules 40 and 80 pipe in pipe sizes whose dimension ratio does not exceed 11, for use in hot- and cold-water distribution systems at a maximum working pressure of 690 kPa and a maximum working temperature of 82 °C; and
b) SDR 13.5 and SDR 21 for use only in cold-water distribution and water service systems at a maximum working pressure of 2170 kPa and 1380 kPa, respectively, and a maximum working temperature of 23 °C.
Note: This Standard does not specify requirements for venting of combustion gases. In Canada, ULC S636 specifies testing and marking requirements for pipe, fittings, and accessories intended for venting of combustion gases. In the United States, UL 1738 specifies testing and marking requirements for pipe, fittings, and accessories intended for venting of combustion gases.
This Standard specifies requirements for materials, quality of work, dimensions and tolerances, hydrostatic sustained pressure strength, thermocycling resistance, solvent cement, joint strength, and markings.
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.