How do you connect bathtub waste to PVC pipes?

If you have slip compression fittings (brass/PVC) on your bath tub over flow and drain then you need to have a adapter PVC glue to compression before the trap running vertical and you will also need a access to inspect the compression fittings by most codes. I use glued fittings on all my tub drain and overflows because its the best kind of connection and you don't need access to it.