Delta Faucet's Diamond Seal Technology

Long faucet life is crucial in keeping maintenance hassles and building operating costs at a minimum. DIAMOND Seal Technology combines a durable DIAMOND Valve with InnoFlex® PEX waterways for no leaks and longer life. The DIAMOND Valve features a disc embedded with real diamonds to last up to 10 times longer than the industry standard (based on ASME.A112.18.1 of 500,000 cycles). Once inside the faucet, water is not in contact with metal contaminants. That's durability you can count on.