IAPMO PS 112-2019涵盖了用于建筑物外冷水分配系统的PVC塑料阀和用于建筑物内外饮用热水和冷水分配系统的CPVC塑料阀，并规定了材料、物理特性、性能测试和标记的要求。

IAPMO PS 112-2019 covers PVC plastic valves intended for use in cold water distribution systems outside a building and CPVC plastic valves intended for use in potable hot and cold water distribution systems inside and outside a building and specifies requirements for materials, physical characteristics, performance testing, and markings.