If there aren t individual shutoff valves.
Fix dripping water filter faucet.
Use adjustable pliers to remove the cap and collar.
Unscrew the leaking.
In detail with images shut off the water supply going to the leaking water filter by turning a ball valve lever 1 4 turn 90 degrees.
Look underneath your sink for the pipes that run up.
A compression faucet has two screw handles one for hot.
If the leak doesn t stop after the first valve is turned off it s the other line that s leaking.
If the pliers won t work buy a tool called a stem puller that was made for your brand of faucet.
If your valves are stuck shut off the water main.
Determine which side of your faucet is leaking by shutting off the water supply valves one at a time.
Turn on the faucet and leave open allowing the remaining water in the line to empty into the sink.
Once you determine which side is leaking turn off both supply valves.
Be careful not to break or damage either piece.
Shut off the water after filter if possible.
Our reverse osmosis ro drinking faucet has developed this slow dripping leaks.
Step 1 turn off the water to your faucet.
Depressurize the filter by turning on the water faucet after the system until water stops.
The problem is getting worst gradually.
Twist the valve under your sink to turn off the water supply valve or valves.
Use groove joint pliers to grip the old cartridge and pull it straight up.
Clean the faucet and the faucet body to remove debris.
Using the special tool included in the faucet repair kit loosen the faucet cam and lift it out along with the cam washer and the rotating ball.
Use a sink plug if you have one or a rag.
This video is about how i dissemble.