Excel Filters XLS-718 4-Pack Replacement Filter Cartridges, Compatible with Pentair Clean & Clear Plus 420 and Waterway 425, Replaces Pentair R173576

These filters work great, and the price is amazing compared to the local pool supply store.

Almost perfect fit

I just recently installed the XLS-718 filters. The filter media looks of good quality; but I have never used these before and they have less than a week of use, so I cannot yet tell how well it filters. I did run into a problem: the center holes on 3 of the filters were slightly smaller on one side compared to the other, so they would not fit on the mounting bracket of the housing without some convincing of the rubber mallet kind... nothing too bad, but still it seems a quality control problem that one side will slide snuggly but effortlessly into the mounting bracket but not the other.

Cost

Great filters at a fraction of the cost that I paid for my first set of filters. What a savings.