A dripping bathroom sink mixer tap is more than an annoyance; it wastes water, increases your utility bill, and can eventually lead to water damage around the porcelain basin. While the constant drip-drip-drip is irritating, the good news is that most leaks stem from a few common, fixable issues. With the right tools and a bit of patience, you can resolve this problem without needing to call a plumber.
Understanding Your Mixer Tap's Anatomy
Before diving into the repair, it helps to understand the mechanism inside your faucet. A mixer tap combines hot and cold water through two separate valves controlled by individual handles. The leak is often a result of worn washers, O-rings, or cartridges failing to create a proper seal. Identifying whether your tap has a single handle controlling both flows or two distinct handles will guide you through the specific repair steps.
Gathering Your Tools and Materials
Preparation is key to a smooth repair. You will need an arsenal of common household tools to disassemble the tap safely. Having everything on hand prevents the frustration of mid-job trips to the hardware store.
- Adjustable wrench or basin wrench
- Screwdrivers (flathead and Phillips)
- Needle-nose pliers
- Allen keys (hex wrenches)
- Flashlight
- Towels or rags
- Replacement washers or cartridges (take the old part to match it exactly)
Shutting Off the Water Supply
Never begin a faucet repair with the water running. Locate the isolation valves, which are usually small valves positioned under the sink that control the hot and cold water lines. Turn them clockwise firmly until they stop. If your sink lacks these valves, you will need to turn off the main water supply to your home. Open the tap briefly to drain any remaining water from the pipes before proceeding.
Disassembling the Tap Handle
The handle is the gateway to the internal components. Most handles are secured by a small screw located at the top, underneath a decorative cap. Pry off the cap gently with a flathead screwdriver to access the screw. Once the screw is removed, lift the handle off the stem. You might encounter a brass locking collar or a clip holding the handle in place; handle these components with care to avoid bending them.
Inspecting and Replacing the Washers
With the handle removed, you will see a stem attached to the handle shaft. At the base of this stem, a rubber washer creates the seal that prevents water from leaking through the valve seat. Over time, the pressure of the water and the minerals in the water can erode this washer, causing it to crack or flatten. Carefully remove the washer and inspect the condition of the O-ring as well. Replace both components with exact-sized duplicates, ensuring a snug fit that prevents future drips.
Reassembly and Testing
Once the new washers are securely in place, reassemble the tap in the reverse order of disassembly. Ensure the stem is properly seated and the retaining nut is tightened correctly, but avoid applying excessive force, which could crack the ceramic body. Slowly turn the water supply back on and let the tap run for a minute. Check the handles for any residual leaks. If the drip persists, the issue may lie with a cracked ceramic cartridge, which would require replacing the entire internal mechanism.
