ANSI CAN IAPMO Z1349:2021 pdf free download – Devices for Detection, Monitoring or Control of Plumbing Systems
1.1.1  This standard covers devices for detection, monitoring or control of water supply and distribution systems in sizes DN 8 to DN 300 (NPS‐1/4 to NPS‐12) for commercial and residential applications and specifies requirements for materials, performance testing, environmental limitations, installation, and markings.  1.1.2  Devices for detection, monitoring or control of plumbing systems, hereinafter referred to as “devices”, covered by this standard govern plumbing systems through features such as:
(a) Automatic shut‐off or electronic alarm notification or isolation of the supply piping when conditions are detected indicating a leak or equipment malfunction (e.g. automatic water leak detection and control device).
(b) Detecting the presence of water external to the piping system.
(c) Establishing normal water flow patterns and monitoring for anomalies.
(d) Monitoring of the hydraulic conditions (e.g. water pressure, temperature, or flow) within the main or branch circuit.
(e) Monitoring of the local environment that may indicate potential for freeze conditions; or
(f) Monitoring of the local environment for moisture that may indicate a leak (e.g. Physical Water/Moisture Detection Devices).
(g) Monitoring of environmental conditions.
(h) Ongoing analysis of sensor readings or system conditions to ensure monitoring of system integrity.
(i) Pressure based or other means of micro leak testing for detection of pinhole leaks or dripping fixtures; or
(j) Provide hardwired or remote access to control a valve (e.g. remotely controlled valves). Note: Several common terms are used to identify devices covered under this standard a few examples of  uch terms are Water Leak Detection Device, Automatic Water Leak Detection Device, Leak Detection and Control Device, Adaptive Plumbing System Monitoring and Control Device, and Electronic Plumbing Supply System Integrity and Protection Device.
1.2  Terminology
In this Standard,
(a) “shall” is used to express a requirement, i.e., a provision that the user is obliged to satisfy to comply with the Standard.
(b) “should” is used to express a recommendation, but not a requirement.
(c) “may” is used to express an option or something permissible within the scope of the Standard; and
(d) “can” is used to express a possibility or a capability.
Notes accompanying sections of the Standard do not specify requirements or alternative requirements; their purpose is to separate explanatory or informative material from the text.
Notes to tables and figures are considered part of the table or figure and can be written as requirements.
1.3  Units of Measurement
SI units are the primary units of record in global commerce. In this Standard, the inch/pound units are shown in parentheses. The values stated in each measurement system are equivalent in application, but each unit system is to be used independently. All references to gallons are to U.S. gallons.
1.4  Amendments
Proposals for amendments to this Standard will be processed in accordance with the standards‐writing procedures of IAPMO.