Review on CFS 2006 Compatible American Plumber W20CLA Whole House Sediment Filter Cartridge 5 Micron for Well Pump Irrigation – Pack of 4 by Michele Olson

Same length and width as American Plumber's W20CLA filter, except for the blue ends. However, when I tried to install, I couldn't screw the canister in more than halfway before the filter began to shrink and deform. I replaced the AP filter which worked without any problems. Not sure why this happened, it didn't appear to be a quality issue, although the paper backings on these filters appeared to be a little thinner than AP filters. Maybe they will work for you, but that was my experience.