CSA B805-18/ICC 805-2018
Rainwater harvesting systems
The provisions of this Standard apply to the design, materials, installation, and operation of rainwater harvesting systems for potable and non-potable applications.
1.1.2 Source waters
This Standard covers the use of rainwater and stormwater as the source water.
Note: Rainwater includes all forms of water from natural precipitation including but not limited to rain, snowmelt, etc. The term “rainwater harvesting” is used generically in this Standard and can refer to harvesting of either roof runoff or stormwater.
This Standard covers rainwater harvesting systems that provide water for
single-family residential applications;
multi-residential applications; and
This Standard does not cover
rainwater harvesting systems that provide water for
process water systems for industrial or manufacturing purposes; and
water distribution systems for commercial agricultural processes; and
collection of surface water.
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 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.
1.4 Units of measurement
The values given in SI units are the units of record for the purposes of this Standard. U.S. customary units given in parentheses are for information and comparison only.