If you're reading this write-up, you're probably wondering whether or not a water filter system is necessary for your situation. If you're using any equipment that requires water, be it a coffee machine, ice machine, or combi oven, you're going to want a filter. The reason being is that filters work to protect your equipment and their respective water lines from mineral deposits, sediment, scale build-up, cysts, and a wide variety of other impurities. Furthermore, as water is an integral part of food and beverages, having a lower quality water can effect the taste. Some warranties will even become void if the water quality is really poor.
Please keep in mind that certain water filter systems may be required depending on the type of water your machine uses. For instance, exclusively hot or cold water machines will require filters suitable for their water type. If your machine utilizes both hot and cold water, then you'll want a filter that can handle both types. Another consideration is how much water your machine is processing a day, and how high the water's sediment is.
Ultimately, purchasing a water filter system will help save you on the extensive repair costs that come with a machine that's affected by mineral build-up.