u may need to tighten it a little or just get a new dishwasher(new!)
If the faucet contains the re-direction valve (closes off the water from the faucet and redirects the water to the shower head) you need to rotate the faucet counter clock wise to unscrew it from the plumbing and replace it with a new one. Take the old one to your local box store and they can match it up for you.
Possibly unscrew your aerator at the end of the spout and see if the screen is clogged. Blow it out and rescrew the aerator on. If that isn't the problem, sometimes things get caught in the spout. Unscrew the spout and turn the water on. If there is water coming from there and not out the spout when it is hooked up, the spout is plugged. If no water coming out when the spout is off, rehook spout and change cartridges or stems in the faucet AFTER shutting the water off. Depends on the brand of faucet, check the instructions for the brand and model. Also your kitchen dishwasher and sinks are run on seperate valves. The dishwasher valve is usually under the sinks (causing the water to go to the dishwasher first) the valve that was installed for the sink (before the dishwasher) may be bad too.
Seperate valve for outside faucet turned off, broken valve stem inside of outside faucet or handle stripped at faucet.
it depends on Where it is leaking from and who the manufacturer is. Moen will replace your cartridge and or faucet for free as they have a lifetime warranty. if it dripping Under the sink you could have a bad valve which means that the entire faucet will need replaced. if it is dripping from the spout it is most likely the cartridge which can be repaired or replaced without having to remove the entire faucet. contact the manufacturer.
mixing valve in a faucet: ok I will assume you are refering to a shower valve, that is the only faucet w/a mixing valve: shut off the hot and cold water. cut out valve or unsweat it. clean and flux new valve, pipe and fittings(if used) sweat in new valve
If the tub has a shower as well, the pipe from the faucet to the shower head could be leaking. You might also check the tube that comes OUT and fills the tub. It could be leaking back at the valve when you turn on the water.
it is a tool that resurfacese the seat on a water faucet valve
Turn the water off to the faucet. Remove the handle. The top of the faucet should unscrew to get to the ball valve. Replace the valve and gaskets then reassemble the faucet.
tap valve
I assume the water is leaking from where the water comes out of when opening the tap. Either the washer needs to be replaced or the seat needs to be reseated. If all else fails, time to replace the whole tap.
Checks the flow of the water
I need to perform a faucet repair. How do I stop a leak that is caused by the screw not being tight enough on the valve?