IAPMO/ANSI Z1157-2014e1 (R2019) Ball Valves

1 Scope
1.1
This Standard covers ball valves in sizes NPS‐1/8 to NPS‐4, with minimum rated working pressures of 860 kPa (125 psi) at 23 ºC (73ºF), intended for use in water supply and distribution systems and specifies requirements for materials, physical characteristics, performance, testing, and markings.
1.2
The requirements of this Standard are not intended to prevent the use of alternative materials or methods of construction provided such alternatives meet the intent and requirements of this Standard.