Expert guide on fixing leaking sinks. Learn common causes and easy DIY fixes to stop drips, save water, and prevent damage.

Head of Content, D. Gorenko
Updated June, 5

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When you notice a leaking sink, the first thing you should do is shut off the water supply to prevent further damage. Locate the shutoff valves under the sink and turn them off. Next, place a bucket or bowl under the leak to catch any remaining water and use towels to soak up any spilled water. This helps protect the surrounding area from water damage.
If you are comfortable using basic tools and following detailed instructions, fixing a leaking sink can be a manageable DIY project. However, if you are unsure about disassembling parts or if the leak persists even after your repair attempts, it is best to call a professional plumber. This is especially important if you encounter issues that involve the sink’s connection to other plumbing systems.
The professional to contact for sink leaks is typically a plumber. Plumbers have the expertise to diagnose and repair issues with your sink’s water supply, pipes, and seals. If your home is in St. Louis or Nashville, companies like Hoffman Brothers specialize in full-service residential and commercial repairs and can help resolve your leak efficiently.
One common reason for a leaking sink is the deterioration of washers, seals, and other soft components. Over time, the materials can dry out, crack, or simply lose their shape, which means water can seep out at the joints.
If the fittings that connect different parts of the sink or faucet are not tightened properly or have become loose, leakage can occur. The connections between the faucet, handles, and hose are delicate and can wear out with time, leading to gaps for water to escape.
Metal pipes that carry water to and from the sink can develop rust or corrosion. In some cases, they might even crack. This damage creates small holes or weakened spots where water can slowly drip or stream out.
The drain assembly is another area that can cause leaks if not assembled correctly. Seals or gaskets in the drain area may break down or be installed incorrectly. This misalignment or deterioration provides an opportunity for water to escape into cabinets or onto the floor.
The interface between the sink and the countertop, or between the sink and the wall, might not have been sealed perfectly. If the sealant degrades or was not applied properly, water can seep through and cause damage over time.
The water supply lines, including flexible hoses or rigid pipes that feed the sink, may develop small holes or may have connections that are improperly secured. A worn-out connection in these lines is a frequent source of leaks.
Sometimes you can even notice these issues in systems of service providers that work in areas like St. Louis and Nashville, where aging infrastructure and daily usage combine to create challenging conditions for even well-maintained sinks.
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SERVING
Brentwood, MO
1025 Hanley Industrial
Brentwood, MO 63144
Nashville, TN
45 Willow St.
Nashville, TN 37210

St Louis Location
(314) 664-3011
St Louis Location
1025 Hanley Industrial Brentwood, MO 63144
Nashville Location
(615) 515-3015
Nashville Location
45 Willow St Nashville, TN 37210
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