UPVC is based on polyvinyl chloride (PVC) which is one of the most versatile polymers.
More and more homes are getting into the hot tub lifestyle, whether it's an inflatable tub or a full on luxury spa that serves as their sanctuary or oasis of calm. In fact my facebook feed is full of friends and family posting "Chillaxing in the hot tub" or "It's hot tub time.... Again!" along with images showing various states of relaxation.