Derpending if the filters are attached to the wall or not, and again I'm not real familiar in these type of filters but it either has a quik connnect type or a screw type. You definetly need to turn water off and then approach the filters. The quik conntct will have a tube either a 3/8" or 1/4" tube entering the top of each filter with a connection at the top with a blue or gray button that surrounds the tube if you push down on the button the line should just slip out or if the filter is a screw type just unscrew it remember righty tighty/ lefty loosy, I hope this helps