They are installed at the faucet where you want the filtered water to come from. For example, many people install water filtration systems in their kitchens, where they are most likely to go for fresh drinking water.
They are set up at your main water line and filter all the water running to your home. These are ideal for people who are on well water, or who struggle with water quality issues throughout their home. The San Diego water filtration experts at HPS Plumbing Services can help you select the products and services that are best for you.