ISO 1452-4:2009规定了用于供水和埋地和地下排水和压力下水管道系统的未增塑聚氯乙烯（PVC-U）制成的阀门的特性。它还指定了所参考的测试方法的测试参数。 结合ISO 1452-1，ISO 1452-2，ISO 1452-3和ISO 1452-5，它适用于PVC-U，其他塑料和非塑料材料组件的PVC-U阀门，用于下列: - 水管和埋在地下的服务; - 在建筑物外部和内部输送地上水; - 在压力下埋地和地上排水和污水。 它适用于管道系统中的阀门，用于在压力达到并包括用于人类消费和一般用途的25°C（冷水）下的水以及压力下的废水时供水。它也适用于输送水和废水的阀门，直至并包括45°C

ISO 1452-4:2009 specifies the characteristics of valves made from unplasticized poly(vinyl chloride) (PVC‑U) for piping systems intended for water supply and for buried and above-ground drainage and sewerage under pressure. It also specifies the test parameters for the test methods referred to. In conjunction with ISO 1452-1, ISO 1452-2, ISO 1452-3 and ISO 1452-5 it is applicable to PVC‑U valves with components of PVC-U, other plastics and non-plastics materials intended to be used for the following: - water mains and services buried in ground; - conveyance of water above ground for both outside and inside buildings; - buried and above-ground drainage and sewerage under pressure. It is applicable to valves in piping systems intended for the supply of water under pressure up to and including 25 °C (cold water) intended for human consumption and for general purposes as well as for waste water under pressure. It is also applicable to valves for the conveyance of water and waste water up to and including 45 °C.