Description
The Omnipure Alkaline pH Filter (K2551‑BB) is a high‑quality water treatment cartridge designed to gently increase water pH and improve taste by reintroducing beneficial minerals. Using a blend of calcite and magnesium media, this filter naturally balances acidic or slightly acidic water — resulting in refreshing, smooth, alkaline drinking water without the use of chemicals or artificial additives.
Built with premium media and precision filtration engineering, the K2551‑BB is ideal for point‑of‑use under‑sink systems, drinking water stations, and whole‑house filtration setups where pH enhancement and mineralization are desired.
Key Features
- Alkalizing Mineral Media – Contains calcite (calcium carbonate) and magnesium oxide to naturally raise water pH and add beneficial minerals.
- Improves Taste & Mouthfeel – Results in smoother, more refreshing drinking water with enhanced taste.
- Boosts Water pH – Ideal for water that’s slightly acidic or low‑mineral to begin with.
- Premium Construction – Made with quality media and casing for consistent performance and long life.
- Standard Big Blue Size – Designed to fit 4.5″ × 10″ Big Blue housings for point‑of‑entry or drinking water applications.
Specifications
- Model: K2551‑BB
- Media Type: Calcite and magnesium mineral media
- Housing Size: Fits 4.5″ × 10″ Big Blue filter housings
- Nominal Flow Rate: Up to ~7–10 GPM (dependent on system and water quality)
- Micron Rating: Not primary sediment filtration — best used with upstream sediment/carbon pre‑filters
- Recommended Capacity: Dependent on water quality and usage
Compatibility
- Fits standard 4.5″ × 10″ Big Blue filter housings
- Works well in point‑of‑entry or drinking water systems
- Fits with other pre‑filters (sediment, carbon) arranged upstream for optimal performance
Applications
- Under‑sink drinking water systems
- Whole‑house alkaline pH adjustment
- Post‑RO mineralization stage
- Cottages and seasonal homes
- Offices and light commercial systems
Maintenance
- Replace media cartridge based on water quality and usage — commonly every 6–12 months.
- Use sediment pre‑filtration to protect mineral media and prolong life.
- Check water pH periodically to confirm performance and replace when pH enhancement declines.
Why Choose the Omnipure K2551‑BB?
The Omnipure Alkaline pH Filter (K2551‑BB) not only balances water pH but also enhances taste by adding beneficial calcium and magnesium minerals back into your drinking water. This makes it a perfect final stage in reverse osmosis systems, under‑sink drinking water setups, or whole‑house filtration where mineral balance and taste are priorities.

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