iSpring WGB21B Whole House Filter Pack - 4.5x10 Sediment & CTO Carbon Block Replacement

Overview and what to expect

The iSpring WGB21B Whole House Filter Pack is built for standard 10 inch housings. It combines two filters in one replacement kit, a 5 micron sediment filter FP15B and a CTO carbon block FC15B, designed to refresh water at every outlet while keeping maintenance simple.

Both components comply with FDA CFR Part 177 and have been tested by an independent third party against NSF ANSI 42 for material safety and water quality. This attention to materials ensures you have a solid foundation for cleaner water across the home.

Two stage filtration that covers the essentials

Stage one uses a premium polypropylene sediment filter with 5 micron density. It captures dirt solids such as sand silt rust dust and scale and helps extend the life of the CTO stage by reducing load on the carbon block.

• Sturdy polypropylene construction with strong chemical resistance
• Reduces sediment that can clog downstream filters

Stage two uses a highly activated CTO carbon block filter crafted with coconuts shell carbon and compact fabrication. It reduces cloudiness and improves taste and odor by lowering chlorine. It also targets organic compounds and other common contaminants that affect water flavor.

• Chlorine removal up to 99 percent
• Targets organic compounds like herbicides and solvents

Performance and life

With proper use, this two filter pack can handle up to 50,000 gallons of water. Replacement every 3 to 6 months is recommended for optimal performance. The fine sediment filter and CTO filter also help protect appliances and plumbing from sediment buildup.

Fit, freshness and support

The pack fits standard 10 inch whole house filtration systems. Each filter is individually sealed for freshness at the time of packaging. iSpring offers a 30 day money back guarantee, extended manufacturer warranty, and lifetime technical support from its team in Atlanta.

Why this matters for your home

Having clean water at every faucet can enhance cooking, cleaning, and beverage preparation while reducing risks of sediment and scale buildup in pipes. Results may vary but many households notice crisper water and improved taste over time.