The installation process begins with shutting off the main water isolation valves beneath your vanity sink or shower frame, ensuring the water lines are fully drained. Slide the threaded solid brass faucet shank through the mounting cutout in your countertop, centering the fixture carefully relative to the basin alignment. Secure the under-sink mounting nut and rubber gasket tightly onto the shank from below using a basin wrench to guarantee a completely watertight seal entirely out of direct sight. Connect your hot and cold braided stainless-steel water supply lines to the corresponding shut-off valves, wrapping the threads with Teflon tape to ensure zero leaks. Turn the water isolation valves back on, running the faucet fully to flush out any internal lines and finalize the luxury upgrade.