Water Filter Housing Replacement O Rings for AP801-AP802, KemFlo 5000 & 10000 Series Replacement by KleenWater (2) Compatible with 3M Aqua-Pure AP801/AP802 Housing by KleenWater A High Quality, Low Cost Alternative to More Expensive OEM O-rings For (3) cartridge kit with (1) o ring Amazon Search KW810EC(3)-AP801oring(1)