Unplasticised PVC (PVC-U) and molecularly oriented PVC (PVC-O) pipes and fittings are widely used for the distribution of water under pressure. The main application is the distribution of drinking water. The diameters are of medium size (generally between 75 mm and 250 mm). The main characteristic of these pipes is the long term resistance to pressure (assessed according to ISO 9080) which is expressed as the MRS (Minimum Required Stress, see also in FAQ).
The pipes for irrigation have similar geometrical and mechanical characteristics.
Safe, durable and cost-efficient
PVC pipes are a safe choice for transportation of drinking water. This is due to their high degree of inertness and resistance to corrosion. PVC pipes are therefore free from bio-film contamination that can be a breeding ground for bacteria. By helping provide clean water, PVC pipes are beneficial to public health.
Because it is used below its glass transition temperature (80°C), PVC can be considered as a functional barrier preventing any low molecular weight substances to migrate to drinking water. Migration tests have demonstrated migration levels far below the detection limit of the most modern analytical techniques. Read more.
The first PVC piping systems were installed over 80 years and most of these are still in use. The expected lifespan of a PVC pipe is 100 years or more for underground pipes. Moreover, PVC water pipes show a much lower failure rate than other materials. PVC water pipes also have the lowest Total Cost of Ownership.