I have a slow drip on my bathroom faucet. how do i repair it. p-f 8" w/separate hot & cold faucets

Glenda, you did not state what faucet you have, but if it is leaking, you have to replace the faucets cartridge.
I will post links below to show how.
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Repairing Cartridge Sink Faucets


Repairing Leaky Two Handle Cartridge Faucet

https://www.google.ca/url?sa=t&rct=j&q=&esrc=s&source=web&cd=4&cad=rja&uact=8&ved=0ahUKEwjSxJezm__KAhWmuIMKHYmJDp0QtwIIPTAD&url=https%3A%2F%2Fwww.youtube.com%2Fwatch%3Fv%3DOJIse2Hql2A&usg=AFQjCNFkkzcF5DT95h_eONfce2cK2wdaGQ

How to Repair Cartridge Type Faucet

Change the gaskets.

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check the aerators on the faucets. i know after i change a hot water tank there is always some crud that comes through the lines and gets stuck in the aerators, they are the part that holds the screens in place on the spouts.

If you notice right below the handle,there should be a small opening where ,by using an allen wrench you should be able to remove handle giving access to the stem retaining nut ......CAUTION... be sure cutoff valve is turned off(both hot and cold cutoffs.... under lavatory sink before removing..........unscrew retaining nut and remove stem.....hope that helps......

Go to delta website, take a picture of faucet with your cell phone and send. They should be able to identify and send you the parts. Meanwhile you'll have to turn water on and off from the emergency shut off valve under the sink. If it looks like the picture, it's probably the rubber seat and spring. If you don't want to wait go to your local "hardware" store. There may be someone there to help you. Bring the stem or cartridge, along with the rubber seat and spring. Don't use cold water while stem is removed. Turn cold off as well to prevent a mishap.

you need to have both done before any judgement is made, the balancing spool could be off centre because of only one water being hooked up. good luck

if it is an old fashioned valve then there are cone washers in the valves that control on and off
they are fairly easy and cheap to replace

On the handle it self you should see a red and blue button plug. Remove this and you will see set screw. Remove handle, remember to shut off hot and cold water supplies under sink before you go any further.

The faucet is slowing wearing out. You can live with this little drip or have a repair kit installed in the faucet. If you are handy you can do this yourself.
You must be sure to get the repair kit that matches your faucet. good luck

Hi, You have to replace the two rubber cups in the hot&cold faucet lever. Let me know if you need more info.