You found a 2-inch Schedule 40 PVC that sat outside for years in NYC. It was a makeshift gutter runoff on a shaded wall. It saw cold winters and wet weather. Now you want to reuse it for plumbing vents. Quick Q&A Q: Can I reuse old outdoor PVC for my vent pipes? A: Maybe,… Continue reading Old PVC Outside? Safe to Use for Vent Pipes?