Warranty Registration for Your BATH FITTER tub or shower Congratulations on choosing BATH FITTER® for your bathroom renovation project. All BATH FITTER® products are covered by a lifetime warranty and are guaranteed to be free from manufacturing defects for as long as you own your home. Note: In order to complete this registration, you will need to have the warranty card that was given to you by the installer. Please click the register button below to proceed with the warranty registration.