AquaSource kitchen faucets, branded and sold through Lowe's home center, use some of the same universal repair parts as Delta, Peerless and even Glacier Bay--the Home Depot brand. When repairing an AquaSource kitchen sink faucet, the most difficult part of the job is usually loosening the handle setscrew. Rebuilding your kitchen sink faucet will probably take you about an hour from start to finish. Take your time and do it right.
Turn the kitchen sink faucet on, and close the small water shut-off valves under the kitchen sink by turning the handles to the right until they stop. If the water does not stop flowing, replace the small shut-off valves first.
Loosen the handle's setscrew with an Allen wrench. The setscrew is located inside a small hole on the front of the faucet handle. Lift the handle off the faucet. Some models will require the removal of a small red and blue index button. You can remove the index button by hand.
Unscrew the cartridge-retaining cap by hand. The retaining ring is the cone-shaped metal section on the top of the faucet directly under the handle. Turn the cap counterclockwise to remove. If the cap is difficult to grip, use a damp washcloth or rubber jar-lid opener to help you get a better hold.
Pull out the cartridge by hand; you may need pliers if it has become laden with sediment. Clean any debris from the inside of the faucet body with a clean cloth. If there is mineral buildup inside the faucet body, use a small piece of plumber's emery cloth to sand the sediment off. Pour a small amount of vinegar into the faucet body and let it sit for 20 minutes. Clean the inside of the faucet again with a clean cloth, removing all of the vinegar.
Install the new faucet repair cartridge by lining up the guides on the faucet and cartridge, and then push the cartridge into the faucet by hand.
Hold the cartridge in position with one hand, and then screw the retaining cap back on the faucet with your other. Tighten the cap firmly; do not use pliers or other sharp-edged tools.
Set the handle on the faucet cartridge and tighten the setscrew with your Allen wrench. Work the handle up, down and around to make sure it is in the right position.
Remove the faucet's aerator, and set it aside. Unscrew the aerator from the end of the faucet spout. This step is to keep any sediment you may have missed, when cleaning the faucet, from stopping up the small screens inside the aerator.
Turn the hot water valve back on under the sink and then the cold water. Let the water flow through the faucet for 20 seconds, and then turn the faucet off.
Reinstall the faucet's aerator. Turn the faucet handle on and off a few times to check for proper operation. Screw the aerator counterclockwise up into the faucet spout.