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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.

A handyperson with basic plumbing experience can install a bathroom faucet, like the kind of skills you’d need to replace a P-trap or swap out a showerhead. They may not have deep knowledge of local plumbing code, though. If your faucet installation requires work on the pipes behind the wall or under the floor, hire a licensed plumber with the necessary training and licensing. 

The cost to fix a leaky pipe ranges depending on location—the easier the pipe is to access, the less expensive the repair will be. Because a leaky pipe under the sink is typically an exposed pipe, this is one of the least expensive repairs for a plumber to do, often costing between $150 to $300 to fix, on average.

Due to the exposed plumbing, pedestal sinks are more challenging to install than traditional closed vanities. Pedestal sinks may also require additional floor and wall support or demolition. However, if you have the correct plumbing in place, then installing a pedestal sink is pretty straightforward and can be completed in a day. However, it’s best to hire a professional sink installer to ensure it’s done correctly.