Why doesn't the 1 sharkbite fitting fit onto the 1 PVC pipe as advertised?

The 1 sharkbite fitting may not fit onto a 1-inch PVC pipe due to differences in nominal sizing and actual measurements. Sharkbite fittings are designed for copper, CPVC, or PEX piping, which have different outer diameters compared to PVC. Additionally, if the PVC pipe is not properly cut or if there is debris or damage at the ends, it may hinder a proper fit. It's important to check compatibility and ensure clean, straight cuts for the best results.