The first step in installing a new bathtub is to remove the old one, and this should be done carefully to prevent damage to the space in which the new tub will be installed. Be sure to turn off the plumbing to that part of the home to prevent water damage or damage to the plumbing itself, and thoroughly remove all old caulk. If mold is present once the old tub is removed, you will need to address this issue before installing the new bathtub, as the damage will continue once the new tub is in place.
Be sure to choose the correct style and size of new bathtub for your bathroom. Think carefully about what style of tub you want, and if the new tub differs in size or shape from the old tub, be sure to consider any remodeling that will need to be done before the installation begins. Most importantly, inspect the plumbing and the area around and beneath the tub for any signs of damage that may need to be addressed before installing the new bathtub. Rot in floorboards, mold on or inside walls, and leaky pipes will all need to be properly addressed before installation proceeds.
Find out if you will need any extra plumbing supplies to accommodate the size, shape, and function of the new bathtub. The faucets and drains may not be located in the same place as the old tub, so you may need to run new plumbing pipes or install new valves to ensure proper function of the new bathtub. You should determine your needs before the installation process begins, and you should make sure to purchase or otherwise gather all the necessary tools and materials to complete the project. Buy high quality caulks and sealants, and be sure to use high quality and reliable tools.
These steps will of course cost money, so before any renovation or installation process begins, you should determine your budget for the process and ensure you have enough money to carry out the project without incident. It is best to budget for unforeseen circumstances and expenses as well, just in case things do not go according to plan. If you are new to plumbing, be sure to do some research about your plumbing system and make sure you understand the basics enough to carry out the project without a professional plumber by your side.