A dripping kitchen mixer tap is more than an annoyance—it wastes water, raises utility bills, and can indicate wear in the internal components. Understanding the causes and applying the right repair method can help you fix it quickly without replacing the entire tap.
Mixer taps combine hot and cold water through a single spout, regulated by internal cartridges or washers. Over time, these parts experience wear due to constant use, leading to leaks. Common reasons include:
Worn ceramic cartridge or washer: Continuous turning wears out sealing surfaces.
Damaged O-rings: These rubber seals prevent leaks around the spout or handle base.
Mineral build-up: Hard water deposits restrict proper sealing.
Loose connections: Frequent movement can loosen internal fittings.
Identifying which part is causing the problem is the first step to solving the issue effectively.
Before any disassembly, locate and shut off the water valves under the sink. Turn both hot and cold handles fully open to release remaining pressure in the pipes. Place a towel in the sink to protect it from scratches and catch any small components.
Depending on the tap model, there may be a decorative cap hiding a small screw. Use a screwdriver or Allen key to loosen it, then gently lift off the handle. Keep all removed parts in order for easy reassembly.
Under the handle lies a retaining nut that holds the cartridge or valve stem. Unscrew this nut carefully using an adjustable wrench. Lift out the cartridge or washer assembly and inspect it. If you see cracks, deformation, or mineral deposits, replacement is necessary.
Ceramic Cartridge: Replace it with the same model. Take the old one to a hardware store to match dimensions and spline design.
Rubber Washer or O-Ring: Replace worn seals with new ones of identical size. Apply a thin layer of silicone grease to improve sealing and longevity.
Reinsert the cartridge or valve, tighten the retaining nut, and refit the handle. Ensure everything is aligned correctly before reattaching decorative caps. Open the water supply valves and test the tap. If the drip persists, double-check that the cartridge or washer is seated correctly.
If your tap continues to leak after replacing the cartridge or washers, internal corrosion or damage to the valve seat may be the cause. In such cases, replacing the entire mixer tap might be more cost-effective. Modern mixer taps come with ceramic disc technology that ensures smoother control and longer lifespan.
Regular maintenance can extend the life of your kitchen mixer tap:
Avoid over-tightening: Turning the handle too hard can damage the cartridge.
Clean mineral deposits: Wipe the spout and aerator regularly using vinegar to dissolve scale.
Check for small leaks: Even minor drips can worsen over time if ignored.
Inspect seals annually: Replace O-rings and washers before they fail.
Use soft water filters: Reducing hardness helps prevent build-up inside the tap.
If the leak continues despite replacing parts or if the tap design is complex, contacting a professional plumber can prevent accidental damage. They can also identify hidden issues in the supply lines or valve seats that are not visible during basic repairs.
Fixing a dripping kitchen mixer tap is a manageable task with the right tools and preparation. Most leaks result from worn cartridges, washers, or O-rings, which can be replaced easily at home. Regular inspection and cleaning help prevent future leaks, ensuring your tap performs efficiently for years. By maintaining your mixer tap properly, you can save water, reduce costs, and keep your kitchen running smoothly.
