I am building a small holding vessle to hold hot water (200 – 212f) to temporary hold the water before it goes through a heat exchanger. I want to build it out of 4″ pipe. My question: Can I use regular PVC or will it have to be 4″ CPVC due to the temmp of the water?
How about neither. PVC can only handle 140 degrees. CPVC is good to 180 degrees, with intermittent, and short, cucles to 200. About the only plastic that will go over 200 degrees on a consistent basis is PVDF which can handle 280 degrees.