what is the difference between upvc and pvc pipe?
Chemically speaking. 1  PVC (Polyvinyl chloride) - Polyvinyl chloride, more correctly but unusually poly(vinyl chloride), commonly abbreviated PVC, is the third-most widely produced synthetic plastic polymer, after polyethylene and polypropylene.
Unplasticized poly(vinyl chloride) (uPVC) (Polyvinyl chloride) - uPVC, also known as rigid PVC, is extensively used in the building industry as a low-maintenance material, particularly in Ireland, the United Kingdom, in the United States and Canada. In the USA and Canada it is known as vinyl, or vinyl siding.