What is the difference between a ceramic cartridge versus compression, or O-ring seal?
Ceramic cartridges are two ceramic disks that sit on top of each, allowing the handles to open and close at precisely the same spot every time. A compression valve uses washers which continually wear out forcing you to adjust the handle position until the washers wear down completely and then must be replaced. O-rings get very stiff and the faucet handles become hard to turn off and on.
