The answer to 'why is my sink low water pressure' is that there are several common causes, including a clogged aerator, mineral buildup, or a problem with the water supply line. Low water pressure can also be a symptom of a more serious plumbing issue.
One of the most common causes of low sink water pressure is a clogged or dirty aerator. The aerator is the small screen at the end of the faucet that mixes air into the water stream. Over time, this can become clogged with mineral deposits or debris, restricting the water flow. Removing and cleaning the aerator is a simple DIY fix that may restore normal water pressure.
Mineral buildup in the pipes or faucet components can also restrict water flow and cause low pressure. This is more common in areas with hard water. Trying to descale the faucet or pipes may help, but if the buildup is severe, you may need to call a plumber to fully clear the lines.
Low water pressure can also be a sign of a more serious issue, such as a problem with the main water supply line to your home. If cleaning the aerator and checking for mineral buildup doesn't resolve the issue, it's best to have a professional plumber inspect your plumbing system to identify and fix the root cause.