We strongly suggest having a licensed plumber (not a handyman) install your RO system, as mistakes are common and easy to make. Leaks or drips are even more common due to the type of connections that are predominantly used in these systems. All RO systems have a faucet or a spout. If there is not a hole already available for that faucet, in most cases that is not a problem. Unlike most plumbers, we have the tools and expertise to core a new hole in your countertop OR create a suitable workaround. One thing to note: do not be surprised if the installation labor cost is more than the system itself. The manufacturers sell these systems at a loss because the replacement filters are proprietary. That’s where they make their money long-term. Once you go through the hassle and cost of installation, you are then vested for the years to come.