Faucet drips and the handle won't shut the water off
A faucet that keeps dripping with the handle pushed fully down has a worn cartridge inside. That is a part, not a new faucet, and it comes out in under an hour on most single-lever kitchen faucets. A handle that feels loose and wobbly is a different fault: the set screw holding the lever to the stem has backed off, and tightening it can restore the shut-off. Replace the whole faucet only when the body is corroded, the brand is unknown and no cartridge matches, or the faucet has never shut off properly since the day it was installed.
Read the full guideWater is leaking under the sink
Where water shows up matters less than when it shows up. Dry everything under the sink, then test the two systems separately. Water that appears only when the sink drains is the trap or a slip joint, and a plumber swaps those parts in under an hour. Water that is there with the faucet off is on the supply side, it runs all day, and both valves under the sink get shut now.
Read the full guideSink leaks around or under the drain strainer
A leak that shows up whenever water runs straight down the open drain is at the basket strainer. The strainer is sealed twice: plumber's putty under its rim inside the basin, and a rubber gasket squeezed by a locknut under the sink. Both give out, and a plumber pulls the strainer, cleans the sink, and re-seals it in about an hour. Replace the whole assembly instead when the body is cracked, corroded, or missing its gasket, because a new seal on a pitted body leaks again.
Read the full guideBathroom sink drain isn't connected and the J-pipe won't reach
An open sink drain with no trap is unfinished plumbing, not a leak, and a plumber finishes it in about an hour. Measure straight down from the bottom of the sink tailpiece to the top of the pipe in the floor. Under about 4 inches, a new trap kit bridges that gap. More than 4 inches, or a drain pipe that sits off to one side, means the trap needs an extension first, and that is where most DIY attempts stop.
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