ASME A112.1002:2020 pdf download.Anti-siphon fill valves for water closet tanks.
1.1
ASME A112.1002 covers anti-siphon fill valves intended to be installed in water closet tanks.
Note: In this Standard, anti-siphon fill valves are also referred to as “devices”.
1.2
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.
1.3
SI units are the units of record in Canada. In this Standard the inch/pound units are shown in parentheses.
The values stated in each measurement system are equivalent in application; however, each system is to be used independently. Combining values from the two measurement systems can result in nonconformance with this Standard.
All references to gallons are to U.S. gallons.
2 Reference publications and definitions
2.1 Reference publications
This Standard refers to the following publications, and where such reference is made, it shall be to the edition listed below, including all amendments published thereto.
ASME (American Society of Mechanical Engineers)/CSA Group
ASME A112.18.1-2018/CSA B125.1-18
Plumbing supply fittings
ASME A112.19.2-2018/CSA B45.1-18
Ceramic plumbing fixtures
ASME (American Society of Mechanical Engineers)
ASME B1.1-2003 (R2018)
Unified Inch Screw Threads, (UN and UNR Thread Form)
ASSE International
ASSE Plumbing Dictionary, Sixth Edition, 2007
2.2 Definitions
In addition to the definitions in ASME A112.18.1/CSA B125.1 and the ASSE Plumbing Dictionary, the following definitions shall apply in this Standard:
Anti-siphon fill valve — a valve that is used to supply water for flush tank refill and, where applicable, trap reseal. The device has an air gap, integral mechanical backflow preventer, or vacuum breaker to prevent the backflow of water from the flush tank into the supply system. The device is operated by a float or similar activation method.
Retrofit device — any replacement fill valve not specifically supplied by the original equipment manufacturer of the water closet tank.
2.3 Abbreviations
The following abbreviation shall apply in this Standard:
CL — critical level
Section III
3 Design and general requirements
3.1 Pressure
Devices shall be designed to function at a supply pressure range of 140 to 860 kPa (20 to 125 psi).ASME A112.1002 pdf download.