cpvc

My contractor installed these CPVC pipes shown in the photo for a double vanity. When you turn on the hot water on either sink (hot water is on the left on both sinks), there is knocking that starts once the water gets hot and it doesn't stop until about 15 seconds after turning off the water...

We bought our house last year. It’s 100 years old, runs off a well, and the majority of the plumbing was updated to plastic give or take ten years ago. I’ve had two joint blowouts in less than a month. First- these are pretty epic failures. What causes blowouts in the pipe AND the fittings...

I was having a bathtub replaced in a rental property. The plumbing is CPVC, approximately 15 years old (put in before I bought the place). Pipe do not appear to be brittle when I touch them. I've never had any leaks at this house. I'm in Florida so the pipes don't get exposed to extreme cold...