A persistent drip or a sudden leak from your faucet disrupts the calm of any home and wastes a significant amount of water over time. Understanding how to fix a broken faucet is a practical skill that saves money on utility bills and prevents costly water damage. This guide walks you through the diagnostic process and step-by-step repairs for the most common faucet failures.
Identifying the Type of Faucet You Have
The first step in any successful repair is correctly identifying your fixture's design. Most residential faucets fall into four categories, each requiring a specific disassembly method. A compression faucet uses separate handles for hot and cold, often requiring a wrench to loosen the stem assembly. Cartridge faucets feature a single lever that moves up and down or side to side, controlling a plastic or brass cartridge. Disc faucets operate with a single handle that rotates a cylindrical disc to regulate flow, while ball faucets use a single lever connected to a ball joint seated in the base. Misidentifying the type will lead to incorrect parts and a failed repair.
Gathering Tools and Replacement Parts
Preparation is the key to a smooth repair, so assemble your equipment before turning off the water. You will typically need an adjustable wrench, a basin wrench for tight spaces under the sink, and a set of screwdrivers in various sizes. A flashlight and a small mirror are invaluable for inspecting hard-to-see areas without disassembling the entire fixture. When purchasing replacement parts, take the old cartridge or washer to the hardware store for a precise match. Plumber’s tape and a small bucket are also essential for managing residual water during the process.
Shutting Off the Water Supply
Never attempt to disassemble a pressurized fixture; doing so risks spraying water and causing immediate panic. Locate the shut-off valves positioned under the sink, turning the hot and cold knobs clockwise to stop the flow. If these valves are corroded or stuck, you must turn off the main water supply to the house. Open the faucet handle fully to drain the remaining water from the lines and relieve pressure. Verifying that no water is running ensures a dry workspace, which is critical for seeing leaks and preventing slip hazards.
Diagnosing a Dripping Faucet
The most frequent complaint is a steady drip, usually caused by worn internal components that fail to seal properly. For compression models, the issue is often a degraded rubber washer that cracks under constant pressure. Cartridge faucets typically leak due to a damaged O-ring or a compromised cartridge seal at the connection point. In disc and ball faucets, mineral deposits or chipped seats prevent the mechanism from closing tightly. By observing where the water appears—around the handle, the spout, or the base—you can narrow down the exact faulty part. Replacing Washers and O-Rings If your diagnosis points to a compression or cartridge faucet, replacing the seal is the most common fix. Begin by removing the handle screw, which is often hidden under a decorative cap that pries off with a flathead screwdriver. Extract the stem or cartridge and inspect the washer or O-ring for cracks, flattening, or brittleness. Even if only one appears damaged, replace both washers simultaneously to ensure a uniform seal. Coat new rubber parts with a light layer of plumber’s grease before reassembly to prevent friction that could cause future leaks.
Replacing Washers and O-Rings
Addressing Low Water Pressure and Uneven Flow
A faucet that struggles to produce a strong stream usually suffers from sediment blockage rather than a seal failure. Over time, mineral deposits from hard water accumulate in the aerator—the mesh screen at the tip of the spout. To clean it, unscrew the aerator by hand or with a wrench, disassemble the mesh, and soak the parts in white vinegar overnight. Flush the faucet handle’s internal valve by turning the water back on briefly without the aerator attached. Flushing clears debris that has lodged inside the cartridge, restoring pressure without the need for part replacement.
