Water is a wonderful tool for relaxing during labor and birth. While some women choose to birth in the tub others prefer to be in the tub during labor only, getting out for the birth of their baby. You never know where a birthing mama will end up!
If you are interested in a waterbirth, I have a portable birth tub that I provide to clients. You will need to purchase a liner, a hose, adapter to attach the hose to a nearby sink, and have a hot water heater that is capable of heating 175-200 gallons of water (most of the time you just need to turn it up).