The flexible hose is an optional installation part that we provide to accommodate most home plumbing connections. If the plumbing in your home does not allow for the flexible hose, please speak with a professional certified plumber who will be able to better determine how to properly connect the bathtub to the drainage system. If you choose not to use the flexible hose, it can be unscrewed at the base.
If the plumbing does allow for the connection, then you may insert the flexible hose into the end plumbing and seal the connection by using a PVC pipe sealant to join the parts together. Please see below for a diagram: