There can be several reasons of bringing a new bathtub. It may either be leaking or has developed cracks. So in the both the case you need a new one as it cannot be used any longer. This can be cost effective affair for you if you follow the given instructions. The first thing is to stop the water supply or it will be quite messy. Then bring a new one and place it near the wall you want. Attach the pipes of the cold as well as the hot water.
Replacement of backboard has to be ensured which is used for support. Take proper care of the plumbing to avoid any kind of leakage or faulty pipes. Hangers can also be used to provide a finishing to the tub. Check the drainage system and other necessary installation required for it. At last seal the enclosures with the tiles and your work is finished.