Mine uses a KW1 filter cartridge and it doesn't look like the one in the Walmart ad you referenced. My cartridge has a raised protrusion at the top, smaller diameter than the cartridge, with an O-ring that seats up inside the housing.
2015 Shamrock 231KSS, Oyster shell
2019 Chev Silverado LT Z71 Ext. Cab, 4x4, 5.3L V/8
Reese Straight Line WDH, 2000W Honda Gen.
2 Old Town kayaks & 2 Boston Terriers - Zoey/Gonzo
Lar & Ruth
55 nights camping 2015, 45 in 2016, 42 in 2017, 37 in 2018, 38 in 2019