Premium Home Reverse Osmosis 50 GPD Undersink Water Filter System With KDF The pre-carbon is a KDF 55 carbon mix with GAC. Automatic shut-off valve conserves water. Chrome, long-reach, lead-free faucet. (Meets CA req.) Removes chlorine, heavy metals, such as barium, cadmium, chromium, radium 226/228 selenium and lead. All components and accessories are included for quick and easy installation.