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Hairline cracks—tiny cracks in the surface—in porcelain sinks can happen due to age, chemical damage from cleaning products, dropping heavy objects on the sink, thermal shock from drastic temperature changes, stress during repairs, and manufacturing errors. Hairline cracks often start very small and grow longer and wider over time. While they may appear problematic, hairline cracks don’t indicate structural problems and may not impact the performance of sinks. However, they can eventually cause water leaks and mold growth if left to grow.

It is best practice to hire a plumber to install a bathroom sink and vanity. Even simple installations require basic plumbing work, such as connecting water supply lines and attaching the sink to the drainage system. While an experienced DIYer might manage a straightforward setup, any complex work, like modifying existing plumbing or installing new lines, should always be left to a licensed plumber to avoid the risk of expensive water damage. In most cases, a plumber will handle the installation, provided it is a straightforward job that does not require custom carpentry. It's important to outline your expectations with the plumber beforehand to confirm they can handle the full project.

Most faucets come with a rubber or plastic gasket that prevents leaks—but that’s not always the case. If your faucet doesn’t come with a gasket or it’s leaking, use a caulk gun to seal the gaps and prevent water damage.

Expect your stainless steel sink to last between 20 and 30 years on average. When well cared for, you can use your sink much longer, particularly if you protect it from rust. A new stainless steel sink costs anywhere from $200 to $1,500 including installation, so it's in your best interest to take extra care to ensure its longevity.