Customer called in about having low hot water pressure on kitchen faucet. Upon arrival, customer explained that when he tried to turn shut off valve on and off water pressure for worse on the hot side. Informed customer it could be the shut off valve or cartridge inside faucet. Gave estimates and customer wants to start with shut off valve. Went ahead and removed shut off valve and shut off valve was open, but handle was stiff. Saw minimum calcium build up. Saw that fixture supply lines has screen in them. Removed screen for both hot and cold. Water pressure was fully restored. Installed new shut off valve as well. Checked for leaks and no leaks detected.