IAPMO SPS 4-2019涵盖了特殊用途的吸入配件，其设计为完全浸入水中，并采用适用于游泳池、水疗中心和热水浴缸的材料，并规定了材料、物理特性、性能测试和标记的要求。设计和/或操作不同的部件可能符合本标准。适当的测试和调查应表明部件的性能以及部件是否符合本标准。此类组件应满足本标准中对材料、饰面和结构的要求。本标准中涵盖的产品的一般概念如图1所示。 本标准涵盖的配件被确定用于游泳池、水疗中心和热水浴缸，以确保身体和头发不被夹住，反映了行业测试的当前技术水平。

IAPMO SPS 4-2019 covers special use suction fittings which are designed to be totally submerged and of suitable material for use in swimming pools, spas, and hot tubs and specifies requirements for materials, physical characteristics, performance testing, and markings. A component varying in design and/ or operation may qualify under this standard. Appropriate tests and investigations shall indicate the component performs as well as components complying with this standard. Such components shall meet the requirements for materials, finishes and construction in this standard A general concept of products covered under this standard is shown in Figure 1. The fittings, covered by this standard, are identified for use in swimming pools, spas, and hot tubs to provide safety from body and hair entrapment, reflecting the current state of the art of industry testing.