They are some differences as follows.
Different materials: PPR pipes use random copolymers of polypropylene, which have different molecular structures,while PVC pipe use polyvinyl chloride.
Different Costs:Due to the material and wall thickness, the production cost and price of ppr pipe and PVC pipe are different, and the price of PPR pipe is relatively expensive
Different places of use：PPR pipes are mainly used indoors, and PVC pipes are mainly used outdoors in places where there is no electricity in some backward areas。
Different compressive performance: PPR pipes have good compressive performance and their compressive strength can reach PN25 or PN32 level, while PVC pipes are weaker and their compressive strength is usually below PN16.
In conclusion, PPR pipe and PVC pipe are both high quality pipes with certain characteristics and application scenarios, and the right material should be selected according to the actual needs; PPR pipe is suitable for some demanding piping systems, such as hot water piping, heating piping, etc., while PVCpipe is divided into two types, one is UPVC pipe and the other is CPVC pipe.UPVC pipe is mainly used for cold water, mostly for building domestic water and agricultural irrigation.And CPVC pipe is mainly used for hot water supply, building domestic water, chemical corrosion-resistant pipes and civil hot water pipes.