When you think about the systems that keep your home running smoothly, plumbing is probably one of the first that comes to mind. Whether you’re washing dishes, taking a shower, or flushing the toilet, your plumbing system is working hard behind the scenes. But if you’re new to homeownership — or just never had to deal with plumbing issues before — the whole system can feel a little overwhelming. Don’t worry. This beginner’s guide will walk you through the basics of residential plumbing so you can understand how it works and how to keep it in good shape.