Waterdrop Alkaline Water Filter Replacement for Berkey BB9-2 - Raises

In this review the Waterdrop Alkaline Water Filter replacement is assessed for people who use gravity-fed filtration systems and want higher-pH drinking water without bottled options. The bottom line: this two-pack is aimed at households using Berkey-style systems or Waterdrop gravity units who want a long-lasting filter that raises water to alkaline levels while removing common contaminants. The reviewer finds it delivers noticeably better taste and measurable pH improvement, with an emphasis on value thanks to the advertised 6,000-gallon lifespan per filter.

Key Features

• Alkaline boost: Designed to increase tap water pH up to about 9.2, the filter is intended to support digestion and contribute to daily hydration with a more alkaline profile.
• Long lifespan: Each filter is rated to treat up to 6,000 gallons, which reduces refill frequency and lowers long-term cost compared with many single-use bottled options.
• Broad contaminant reduction: The alkaline black carbon media targets chlorine, lead, PFOA, PFOS, taste and odor, large particles and sediment to deliver cleaner, better-tasting water.
• Cost efficiency: With an estimated cost near 1 cent per gallon, the pack is an economical option for households that rely on a gravity-fed system for daily drinking water.
• Compatibility: The filters are made to replace Berkey BB9-2 black filters and fit Travel, Big, Royal, Imperial, Light and Crown Berkey series units, as well as Waterdrop gravity systems.

Who It's For

These filters are best for families or individuals who already own a gravity-fed water filter system and want a replacement that increases alkalinity while reducing common contaminants. People who prefer a low-maintenance option that does not require electricity and who value long filter life and lower per-gallon cost will appreciate this pack.

Those who need certified lab results for specific contaminants, professional installers, or users of cartridge-only under-sink systems may want to consider alternatives with explicit third-party certifications or different form factors. Also, users who cannot adapt to the necessary faucet flushing procedure before first use should review installation notes carefully.

Pros & Cons

Pros

• Long service life that lowers replacement frequency and waste.
• Improves taste and raises pH, giving water an alkaline profile many users prefer.
• Effective at reducing chlorine, lead, PFOA/PFOS and sediment according to the product description.
• Cost-effective per gallon compared with bottled water.

Cons

• Filter quality comments are mixed among users, so performance may vary with source water.
• Requires an initial flush and correct faucet connection; splashing can occur if a faucet is not fully compatible.

Specifications

Product type	Alkaline black carbon gravity filter (pack of 2)
Compatible with	Berkey BB9-2 replacements; Travel, Big, Royal, Imperial, Light, Crown Berkey; Waterdrop gravity systems
Filter capacity	Up to 6,000 gallons per filter
Key reductions	Chlorine, lead, PFOA, PFOS, taste and odor, sediment
pH effect	Raises water pH up to about 9.2
Pack size	2 filters

Our Verdict

The Waterdrop Alkaline replacement is a practical choice for gravity system owners who want better-tasting, higher-pH water without frequent cartridge changes. It represents strong value when long life and contaminant reduction are priorities, though buyers seeking certified lab reports or guaranteed identical performance to branded originals should factor that into their decision.

Frequently Asked Questions

Are these filters compatible with Berkey systems?
Yes, they are designed as replacements for Berkey BB9-2 black filters and fit most Berkey series models as well as Waterdrop gravity systems.

How long does each filter last?
Each filter is rated for up to 6,000 gallons of treated water under normal use conditions.

Do I need to flush the filter before use?
Yes, the manufacturer instructs users to flush the filter for about 1 minute before normal operation and to ensure the faucet connection is compatible to avoid splashing.