My kitchen sink faucet has lost all of its gusto, it just pours out a low pressure stream, no matter how wide open I rotate the knob for cold or hot water. I checked to see if there were any water leaks, and that doesn't appear to be the case. I have good water pressure in all of the rest of the sinks in the house, and shower heads for the bathrooms. I also have a water-gun sprayer that's attached to the same water line and its spray output does vary as I turn the knob, so I suspect my faucet assembly is to blame. Does this seem like a valid diagnosis? I just found it strange that a faucet would inhibit water flow after years of normal service. This is a 12 years old house/faucet.