I have a two handled kitchen faucet from Glacier Bay/Pegasus with a sprayer. We have always had really poor water pressure from the faucet, but A LOT of pressure from the sprayer. I noticed that the water does not stop flowing from the faucet when the sprayer is in use. It doesn't even change pressure in anyway. I think this might be due to a problem with the check valve or something. And yes I have cleaned the screen and the cartridges. Please Help!