POU systems filter your incoming water right where you use it. That could be an individual tap, faucet, or shower. POU systems encompass filters that connect to a water line under the sink, filters that attach to your faucet, and even filtration pitchers you fill with water.
POE water filtration systems are also known as “whole home” systems because they filter all the water that comes into your home or business. These systems attach to the mainline where water enters your home and filter all of it before it reaches any sinks or showers.