PVC pipes are generally categorized into four: PVC-U unplasticised PVC), C-PVC (chlorinated PVC), PVC-O (molecular oriented PVC) and modified PVC. Besides sharing many of the same properties, each type of PVC has its own advantages for different applications. In the residential and commercial domain, PVC pipes are used in plumbing, drainage, agricultural irrigation, electricity & telecommunications systems and the ductwork of heating and cooling systems.