IAPMO IS 33-2019e1规定了带弹性垫圈接头和配件的球墨铸铁管以及用于冷水建筑供水和场地管道的带溶剂胶结或弹性垫圈接头的PVC管道的止推块安装要求。

IAPMO IS 33-2019e1 specifies requirements for the installation of thrust blocking for ductile iron pipe with elastomeric gasketed joints and fittings and PVC piping with solvent cemented or elastomeric gasketed joints intended for cold water building supply and yard piping.