KleenWater 4.5 x 20 Inch Carbon Block Filter With PolyPhosphate For Scale, Corrosion and Staining, Compatible with Aquios RCFS236, AQFS234, AQFS234L, Express Water Pho FLTWH2045P, Set of 2

The KleenWater KW4520CB-SlowPhos replacement filter is compatible with Aquios RCFS236 and Express Water PHO FLTWH2045P. A water softener operates on the principle of cation exchange which removes hardness cations and replaces them with sodium ions. Soft water is absent of dissolved mineral that cause hardness i.e. calcium and magnesium. Our water filter does not soften the water but the Slow Phos polyphosphate does sequester the hardness cations thus inhibiting mineral scale formations and minimizing corrosion throughout the water system. The SlowPhos ingredient is also effective at removing existing accumulated scale especially in the hot water system. Scale accumulation in a hot water heater can lead to significant inefficiency. As the scale thickens it acts as an insulator obstacle that the heat source has to battle to increase the water temperature. An 1/8" scale formation in a hot water system can increase energy demands 30-40%. The NSF approved SlowPhos polyphosphate will react with naturally occurring calcium bicarbonates in the water supply to form a thin, tight, non-corrosive, passivating film on pipe walls. This film is almost like a glass coating, separating the water from the metal plumbing / hot water system. Also the activated carbon content will adsorb chlorine and chemicals yielding very high quality water. The cartridge dimension is 4.5" (W) X 20" (L) and is of carbon block construction. It will allow up to 6 gallons per minute flow rate and will remove chlorine for 40,000 gallons. Removes dirt and sediment down to 5 microns.

• KleenWater 4.5 x 20 inch carbon block water filter with Siliphos
• Protects hot water system corrosion and maintains energy efficiency
• Designed to reduce chlorine taste and odor and utilizes a natural, polyphosphate additive known as Siliphos to control corrosion and hardness scale.
• Removes dirt and sediment down to 5 microns - allows up to 6 gallons per minute flow rate and will remove chlorine and provide scale control for 40,000 gallons
• Compatible with Express Water PHO FLTWH2045P, Aquios RCFS236 AQFS234 AQFS234L
• Helps reduce iron and manganese staining in cold water applications