A steady drip wastes water and money, but most leaks can be fixed at home with calm prep and a few parts. Chapter 1 teaches you to identify where the leak starts and what faucet you have—compression (washer), cartridge/ceramic disc (cartridge), or ball (cam, springs, seats). You shut off water at the angle stops, verify zero pressure, protect the sink, and remove only caps or handles to confirm the type. You leave with clear photos and a precise parts list. Chapter 2 is the repair. For compression, you replace the rubber washer and inspect or replace the valve seat. For cartridge/ceramic disc, you swap the exact cartridge and re-seat the clip or nut. For ball types, you replace the springs, seats, and packing, then set the ball and cam. You hand-start threads, protect the finish, restore water slowly, purge air, and run a two-minute drip test plus checks for smooth handle travel and dry joints. Chapter 3 handles problems that linger or return. You trace base leaks to spout O-rings, under-sink moisture to supply or shutoff issues, and random night drips to high pressure. You test house pressure, tame water hammer, set a simple maintenance routine, document part numbers, and build a small faucet kit. The win is a dry spout, quiet nights, and confidence to handle the next repair.