ISO 15874-1:2003 specifies the general aspects of polypropylene (PP) piping systems intended to be used for hot and cold water installations, within buildings, for the conveyance of water which may or may not be intended for human consumption (domestic systems) or for heating systems, under design pressures and temperatures appropriate to the class of application.

It covers a range of service conditions (classes of application), design pressures and pipe dimension classes.

It also specifies the test parameters for the test methods referred to in the standard.

In conjunction with the other parts of ISO 15874, it is applicable to PP pipes, fittings and their joints, including joints with components of other plastics and non-plastics materials intended to be used for hot and cold water installations.