Unplasticized polyvinylchloride, or PVC-U, can be used, for example, in the following applications (this is not an exhaustive list)
Chemical installations, applications involving potable water, the food and beverage industries, pools and ponds, and irrigation.
The significant and crucial advantages of PVC-U
good corrosion resistance, ease of installation, low maintenance requirements, and durability;
Good qualities in the 0°C to 60°C temperature range.