greenhouse

I will be running a water line from an existing line at a frost-free hydrant to a new greenhouse. There are SO MANY new options for type of piping - PVC, flexible PVC, PE, PEX ... and on and on. Can someone recommend thoughts on best piping to use for this? Probably 3/4 inch but perhaps 1...

Hi, I'm making a greenhouse frame with 3/4" Sch 40 PVC pipe, and I cannot figure out how to dry-fit these pipes into the fittings so that they are secure, but can easily be disassembled. I don't have any high-tech devices or power tools, so I'm really looking for a simple, low-tech way to solve...