Watts
Compatible to Intelifil (IF-SM-KDF85020B) 20"x4.5" 40,000 Gal. KDF-85-GAC Hydrogen Sulfide & Iron Reduction Filter by IPW Industries
$187.00
$209.92
The IPW Industries compatible replacement for Intelifil IF-SM-KDF85020B combines KDF-85 media with granular activated carbon in a 20"x4.5" format to target iron and hydrogen sulfide while delivering 40,000 gallons of filtration capacity. This dual-media cartridge fits standard big blue housings and handles the toughest well water challenges including metallic taste, rotten egg odor, scale, and microbial growth.
SPECIFICATIONS
Core Performance Data
Filtration Rating
10 Micron
Nominal sediment capture
Filter Capacity
40,000 Gal
Based on typical municipal or well water
Flow Rate
4 GPM
Maximum recommended
Dimensions
20" x 4.5"
Standard big blue size
Filter Weight
10 lbs 6 oz
Heavy media load for long service life
Temperature Range
40°F – 100°F
Suitable for hot water applications
TECHNICAL DETAILS
Filter Media & Construction
| Primary Media | KDF-85 (dark granular copper-zinc alloy) |
| Secondary Media | Granular Activated Carbon (coconut shell) |
| Primary Targets | Iron, hydrogen sulfide, heavy metals (lead, mercury, arsenic, copper) |
| Secondary Targets | Chlorine, chloramines, VOCs, THMs, taste and odor compounds |
| Scale & Microbial Control | KDF media inhibits bacterial growth and algae, controls lime scale buildup |
| Compatible Brand | Intelifil model IF-SM-KDF85020B |
| Manufactured By | IPW Industries for Watts |
COMPATIBILITY & APPLICATIONS
Where This Filter Works Best
This cartridge is designed for 20-inch big blue housings and works across whole-house systems, commercial installations, and well water applications where iron and hydrogen sulfide are persistent issues. The KDF-85 formulation specifically addresses the challenges of private well water including metallic staining, sulfur odor, and microbial contamination. Compatible with standard big blue filter housings from major brands including Watts, Pentek, and Culligan. Ideal as a pre-filter for reverse osmosis systems or as a standalone solution for point-of-entry treatment.
💧 Pro Tip: KDF media performs redox (reduction-oxidation) reactions that actually work better in warm water, making this an excellent choice for whole-house applications where hot water lines benefit from the same filtration as cold. Replace every 12-18 months in typical well water conditions, or monitor pressure drop as an indicator of media exhaustion.
