Using this soap dispenser is a breeze. Just place your hand under the dispenser, and the automatic 'touch - free' feature will release the right amount of soap thanks to the portion control. To save costs, use universal bulk liquid soaps. When it's time to refill, the top - fill design allows you to do it easily. For new installations, double - check that the mounting hole is 1 - 3/8” (35mm) in diameter. If you're retrofitting, make sure the hole size is correct too, and enlarge it if necessary. Keep it clean regularly to maintain its efficiency and the chrome finish. Refer to the installation instructions for detailed mounting steps.