That&#x27;s exactly what I did last year :-)
A stand alone sediment filter where I turn two valves to reverse the flow of water. It&#x27;s not very aesthetic and it takes more space but it does make my life easy.<p>Regarding your 2nd point, most of the cartridges use a &quot;Welded Housing&quot; and carry the &quot;Dow Filmtec&quot; brand. However there are sellers on ebay that supply housing that can be opened and you can fill your own filter material. I&#x27;m a little skeptical on taking this route without an understanding or testing ability of what effect it would have on drinking water. I wonder if there&#x27;s an off-the-shelf complete water test kit or a lab that would do that for me.