If you're handy, you can install the under-the-sink filters (Aquaversa and Aquaperform) or inline filters (Aquaversa and Aquaperform) on your own. Otherwise call your handyman or handy neighbor. A friend installed my Aquaversa under-the-sink filter in less than 30 minutes.  The countertop filters (Aquaversa, Aquaperform, Aquadome and Aquamini) take me a couple of minutes to attach or remove, If you choose reverse osmosis technology (AquaRO) or the whole-house filter (Aquasource), you'll want to call a plumber. If you have questions about installation or need to troubleshoot while you're in the process, call Multipure's customer service team at (800) 622-9206. They have heard it all and will provide great technical support.