Pentek 20″ Big Blue Iron Reduction Radial Flow Filter (RFFE20-BB)

Description

The Pentek 20″ Big Blue Iron Reduction Radial Flow Filter (Model RFFE20-BB) is a high-capacity whole-house filter cartridge engineered to reduce dissolved iron in drinking water. Designed for use in 20″ Pentek Big Blue filter housings, this specialty radial-flow cartridge helps improve water taste and clarity, while protecting plumbing and appliances from iron-related staining and corrosion — all without adding chemicals to your water.

Key Features

• Effective Iron Removal – Designed to reduce dissolved iron up to ~3 ppm, helping improve water taste and reduce metallic flavor.
• Radial-Flow Design – Large diameter and radial flow media maximize contact with water while maintaining good flow rates in POE systems.
• Whole-House Protection – Helps eliminate unsightly orange/brown rust stains on sinks, tubs, and fixtures and reduces wear on water heaters and appliances.
• Chemical-Free Filtration – Adds no harmful additives, making it safe for all drinking water applications.
• Big Blue Compatibility – Designed specifically for 20″ Big Blue housings (4.5″ diameter), making it suitable for point-of-entry (POE) iron reduction setups.

Specifications

• Model: RFFE20-BB / 155263-43
• Filter Type: Radial flow iron reduction cartridge
• Dimensions: ~4.5″ (Ø) × 20″ (L), fits standard 20″ Big Blue housings
• Iron Reduction: Up to ~3 ppm dissolved iron
• Recommended Operating Conditions: pH > 7.0, silica < 100 ppm, manganese < 1 ppm (no iron bacteria or hydrogen sulfide)
• Safe for: Drinking water applications — chemical-free iron mitigation

Compatibility

• Fits all 20″ Big Blue filter housings (Big White, Big Clear, or other brands with the same size) designed for 4.5″ × 20″ cartridges.
• Works well as part of whole-house pre-treatment, typically placed after the pressure tank or water meter.
• To extend service life and improve efficiency, pairing this cartridge with pre-sediment and post-carbon filters is often recommended.

Applications

• Well water iron reduction — Helps reduce dissolved iron for clearer, better-tasting water.
• Rust stain prevention — Minimizes iron deposits that cause orange/brown staining on fixtures and laundry.
• Whole-house filtration — Ideal for protecting plumbing and appliances from iron-related buildup.

Maintenance & Replacement

• Replace regularly based on water quality and iron levels — cartridges can last months to over a year depending on iron content and household use (e.g., ~26,000 + gallons treated with 3 ppm iron).
• Inspect flow and water quality to determine optimal change intervals.
• Flushing new cartridges before use helps remove any loose media fines.

Why Choose the Pentek RFFE20-BB?

The Pentek RFFE20-BB offers an effective, simple, and chemical-free way to reduce iron from well or municipal water supplies at the point-of-entry. With its radial-flow media and compatibility with robust Big Blue housings, it’s a strong choice for homeowners who want improved water quality, reduced staining, and extended appliance life without complex equipment.