Hello. I think that when the time comes to replace plumbing, it will definitely be clear to you. If the drain in the sink, shower or toilet is often climbed. If there is an unpleasant smell in the bathroom and kitchen, if the water does not drain or you see that there is condensation on the walls. All this may indicate that the condition of the plumbing is in poor condition. But there are also small leaks that you can’t immediately determine. then it is better to contact the master, for example, from POM Group Plumbing . They will test the condition of the pipeline and then tell you if you need a replacement or you can get by with a repair.