Hi everybody, I'm involved with a project that wants to use PVC pipes as gutters for a rainwater harvesting system. The water is intended for human consumption (after it passes through clay filters to take care of biological contaminants). I've been looking at PVC degradation under UV and there doesn't seem to be a clear answer for what contaminants may be released from UV exposure, or what a (safe) method of protection might look like. I've been reading about latex water-based paints but don't really understand if they are safe to use with drinking water. Any ideas?