Unscrew the spray head from the hose and place in the sink. Turn the water on. This only verifies that the low water pressure is not caused by a part within the faucet. If pressure is normal, the problem is with the restrictor which looks like a circle disk located at the thread entrance where the spray head connects to the hose. To remove the restrictor, use a small tool such as a screwdriver, pinch to the side and pull out the restrictor. Check the water pressure again and if fixed attach the spray head back to the hose. If the problem continues call customer service at 1-800-694-4837.