My kitchen faucet has low water pressure both hot & cold. My faucet is a Bixby 538. I removed the spray head and the pressure is still very low. The pressure is good up to the shut off valves under the sink.

Check the inside of the faucet for debris blocking the cartridge or the inlets.

sounds like a bad faucet//only if you had good pressure before it was installed..to cheaply test..take the hot water off from the shutoff valve and spray it into a milk jug to see if theres good flow..then replace the faucet assmbly..dont forget to turn off the shutoff valve first..or you will get a watery surprise!

If it just the hot or just the cold then it will be the shutoff valve not the faucet. replace the valve/s under the sink Try checking the screen in the head of the faucet for sand. If it does not have a screen(some dont) then it will have a restrictor usually green in color that may have debris inside of it.

Check the aerator and see if it is getting plug up.

there is sediment in it somewhere. flush lines out.

Remove the spray head and point the hose into the sink drain. Turn the faucet on. If you have good pressure, cal American Standard for a free replacement spray head.
If you still have low water pressure without the spray head, ask them for a new faucet cartridge.
After replacing the faucet cartridge, if you still have low water pressure you will need to ask for a new faucet, possibly free if yours is still under warranty.

I have moen kitchen faucet # 7560 and water pressure very low. What should I do? We check water flow in pipe it is ok. I changed cartridge as well as pipe nothing help. Please let me know. thanks

start by making sure the valve that supplies hot water to the sink and dish washer is fully open. If there is low hot water pressure in any of the other kitchen/bathrooms, then trace the line to see where the pressure drops. If it is only in the kitchen, it should be an old valve, (causes restriction)Good Luck.

If you remove the supply line from the faucet and open the valve into a bucket, do you have adequate pressure? If you do, you will need to remove the hot water stem to see if something washed up into the faucet when you first turned the water on.

Your problem is a simple one.

1. Turn off water to faucet.
2. Place a towel(s) in the base of the sink(s) to prevent any parts from going down drain.
   
3. Remove the handle to the faucet. (single handle only)
   
4. If not a single handle then remove spout from faucet.
5. If a single handle remove cap carefully and any loose parts.
6. Gently turn spout side to side while lifting to remove.
7. You will see a hole with a very small valve where the water comes out to the spout on the base of the faucet.

1. Remove this valve (which is a backflow preventer) and replace.
2. Reassemble and test.
   

Problem solved.