What are the characteristics of PPR water supply pipes?

Key characteristics of PP-R water supply pipes include being non-toxic and hygienic. The molecular structure of PP-R consists solely of carbon and hydrogen; it contains no harmful or toxic elements, making it safe and hygienic for use in both hot/cold water piping and pure drinking water systems. They offer good thermal insulation and energy efficiency; the thermal conductivity of PP-R pipe is 0.21 W/m·K, which is only 1/200th that of steel pipe. They also possess excellent heat resistance, with a Vicat softening point of 131.5°C and a maximum operating temperature of 95°C, meeting the requirements for hot water systems in building plumbing standards. 

They have a long service life. Under conditions of 70°C operating temperature and 1.0 MPa operating pressure (PN), the service life can exceed 50 years; at room temperature (20°C), it can exceed 100 years. Installation is convenient and connections are secure. PP-R features excellent welding properties; pipes and fittings can be joined via heat fusion or electro-fusion. Installation is easy, joints are robust, and the strength of the connection point exceeds that of the pipe itself. 

Regarding water pipe layout: before installation begins, it is crucial to communicate thoroughly with the workers. Do not leave room for arbitrary decisions that could lead to intentional lengthening of the pipes and subsequent disputes. It is important to emphasize that if you discover the piping has been unnecessarily extended, you must insist that the workers correct it immediately, regardless of the circumstances. This is not merely a matter of overcharging for materials; excessive length can impair performance, particularly for hot water delivery. If hot water lines are too long, the water may fail to reach the required temperature at the tap, and rectifying this later would be troublesome. 

It is recommended to route water pipes along the ceiling (concealed by a dropped ceiling or similar feature) rather than under the floor; a leak beneath the floor would be a source of deep regret. Consequently, pressure testing the installed piping is vital. You should be present during the test, which should last at least 30 minutes—or ideally, one hour if conditions permit. The system must maintain a pressure of 10 kg without any drop to pass the test.