Water leaking under handle - Kohler K-10416-BN Fort½ Single Control Kitchen Faucet with Side Spray...

I assume you are referring to the Hangrohe. https://images.homedepot-static.com/catalog/pdfimages/a7/a79e5618-65fc-4e21-9a59-dd8bcc4773aa.pdf
It appears there are detents that hold the handle so push ON and pull OFF. Firm grip and pull should remove the handle. Although, if yours has leaked for weeks/months, corrosion/deposits under handle may make it difficult. If coldle hand doesn't budge, try removing the hot as it has not been leaking and may pop off with less effort. Then go after the other. Note; you may as well replace both cartridges.

leaking around handle?Turn water off under sink.remove handle,cover plate,unscrew valve stem assembly,and turn the two pieces apart to expose o ring,and replace

No diagram available, but I should be able to walk you through the process easy enough. First, make sure your water is off and you have relieved the existing pressure by opening a nearby faucet until the water stops running. Then remove the handle. Under the handle there will be a nut that can be removed with an adjustable crescent wrench or water pump pliers (if you use the pliers be careful not to mar the surface.) Make note of which way the stopper for the handle is sitting, this is the raised piece of plastic on top of the stem. Then after the nut is removed, you can use some pliers to grab the center of the stem and pull straight out. Once the stem is out, inside the faucet you will see the seat (the rubber piece) sitting down in a little hole and under that a spring. These two pieces are typically the culprit for the leaking faucet so make sure you replace these as well or the faucet will continue leaking. Then working in reverse order, put the new items back in place and then before tightening the handle in place, turn the water back on and check for leaks at the handle as well as the spout. If you have any leaks, tighten the nut at the handle if that is what is leaking, or turn off the water and start the process again to reposition the seat and spring. Good luck, you can do it.

what valve do you have. most likely you will need to replace the cartridges

Check handles and make sure water is not coming out of stems and running under faucet. .

Don't know what type of handles you have plastic or metal remove handle .

Turn water on and remove handle and you should be able to see if water is coming from stem if it is it's probally a washer.

"O" ring seal probably need replacement water off disconnect handle and remove valve remove "o" ring and replace

There's a little set screw that u have to take out with an allen key. then after u take the handle off u have to unscrew the cartridge and take it out and replace with a new one. they're made out of plastic- they break easily.

turn off main water in home . turn on tap some where in home to release presser take shower handle off (screw under cap) unscrew the tap with a wrench unscrew on insides you pull out replace washer put all back togethere

I am assuming that your kitchen tap is leaking through the spout

if it is single lever you will need to remove the crown and spout by removing a small erasure size cap on the housing right under the spout or up near the back of the ever then use a hex wrench to remove the set screw( plug the drain holes do it does not go down the drain)

turn the water off (hot and cold ) under the sink
remove the set screw and lift off the lever

at his point you can take an adjustible wrench(channel lock and tighten the big ring nut that holds the cartridge in place

temorairly put the handle back on and put the handle in the off position turn the water on under the sink and see if it stopped leaking

if it still leaks you have to turn the water back off and remove the lock nut then the cartridge and go to big box store with old cartridge and name of mfg and get a new one and install

If you have seperate hot and cold valves on top of sink deermne which is leaking by turning one off with oher on undr the sink

once you have determined which it is (hot or cold)
take a phillips head screw driver( remove plastic clear cap on top of faucet handle with sharp crewdriver of knife blade) and remove the screw holdin the handle on to the stem(turn counter clock wise

be sure to turn water of under snk on both faucet risers after removing acrylic handle you then take an adjustible wrench and remove the crown nut turn counter clockwise until it comes off over stem

remove stem( looks like size of a pretzel about six inches long with washers on side and one on end

take the stem to local hardware(ace) or big box store and go to lumbing section ask clerk to inspect and recommend replacement washers or replacement stem (if needed)

go back reinstall and tighten crown nut snug( open (turn counter clockwise) tem valve before you snug it down with crown nut
install acrykic or chrome handle with brass phillips screw then ut cap on and turn on water and check for leaks

good luck

The pump filter seals in a most unintuitive way. It works well, but is hard to figure out and troubleshoot. If it becomes unsealed or pops out, the machine will leak horrendously.

Open trapdoor at bottom right of machine. If you see water leaking from around the filter handle, then proceed; if not, your problem is elsewhere. Pull on the filter handle, turning counterclockwise if necessary, until the filter comes out of the machine. Hold the filter in one hand and turn the handle counter-clockwise with the other. You may need pliers. Unscrew handle completely from filter. Place filter back into machine, pushing the rubber gasket into the opening with your fingers. Screw the handle back on, tightening as much as you can with your hands (pliers not needed this time). This should take care of the leak.

The way this works is that tightening the handle compresses the gasket and makes it bulge and seal the opening. But it must be uncompressed first, so you can get it all the way into the opening. Cool design, but not obvious, and not well described in the manual.