Three Watts SF5-20-425, Pentek WP5BB20P, WP5BB20P Compatible String Wound Water Filter Cartridges - 4.5 X 20 Inch - 20 Micron Replacement Water Filters - One WSo3X10039 O-Ring

This high quality kit includes (3) KleenWater KW4520SW string wound water filter cartridges and (1) o-ring compatible with Pentair and Pentek "Big Blue" water filters. The cartridges are made in the USA of FDA grade polypropylene and will trap sediment down to 20 microns. To provide prospective to the 20 micron sediment entrapment rating, it is important to note the naked human eye can see down to 20 microns and a human hair is 100 microns in diameter. The cartridge should be changed every 6 months or upon substantial pressure reduction. The KW4520SW is a compatible replacement to Watts SF20-20-425, Pentek WP20BB20P, Shelco MS20FP2045, Shelco MS20PP2045 and Liquidtec SWF-45-2020. The o-ring will accommodate filter housings which require large diameter cartridges. These cartridges have an approximate diameter of 4.5 inches. The o-ring itself actually measures approximately 5.465 inches (inside diameter). We recommend consumers keep a spare o ring on hand to avoid urgent situations. This o-ring is compatible with Part # 151122. An o-ring facilitates a water tight seal between the water filter sump and the water filter head. The most common o-rings used in water filtration are made from Buna N material. Buna N is also commonly referred to as nitrile. This is the ideal choice for cold water filtration because they are inexpensive and have superior performance characteristics. The o-ring and cartridge are rated for a maximum temperature of 180 degrees.

• Three KleenWater 4.5 x 20 inch String Wound Filters - One KleenWater o-ring
• 20 micron dirt, rust, sediment entrapment
• Made of FDA grade polypropylene - Made in the USA
• Precise geometric patterns insure high efficiency
• O-Ring is compatible with Pentek, Culligan and Pentair "Big Blue"