The answer to 'lifespan of bathtub' is that a well-maintained bathtub can typically last 10-15 years or more with proper care. Bathtub materials like porcelain, acrylic, and cast iron have different lifespans, but proper installation, cleaning, and avoiding damage can extend the lifespan of any bathtub. Regular cleaning, re-caulking, and addressing any cracks or chips can help maximize the lifespan of your bathtub.
However, factors like heavy use, water quality, and the quality of the original installation can impact the lifespan. If you notice significant wear, cracks, or other damage, it may be time to consider replacing the bathtub to prevent leaks or other issues. Consulting a professional plumber can help you assess the condition of your bathtub and determine the best course of action.