The DripStop Valve permanently replaces old-fashioned rubber washers used in compression faucets. It will last forever and is guaranteed for life. DripStop uses a faucet\’s own internal water pressure to create a long lasting watertight seal, and never makes contact with any sharp metal surface. DripStop even seals in faucets with chipped or worn seats! More information is available at www.dripstop.com.

Source: DripStopValve