" Advice on use and installation Before fitting, we advise you to carefully purge the hot and cold water pipes to prevent dirt and residue from compromising the proper functioning of the fittings. - After turning off the main water supply, remove the old taps. - Thoroughly clean the threads of the main water supply pipes. - Install the kitchen mixer tap in a 35 mm hole in a sink or worktop. Care instructions To keep your faucet as long as possible, it is best to clean it daily with a damp non-abrasive or microfiber cloth, and finish by wiping with a microfiber or dry cloth. Never use solvents, metal sponges, bleach, acids, strong detergents, cleaners s harsh chemicals or solvent-based cleaning solutions on the product. "