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Overview

Alkaline Filter, Adds Beneficial Mineral ( K⁺, Ca²⁺, Na⁺, and Mg²⁺ ), 3-Second Quick Replacement

Waterdrop RT-ALK Filter, Replacement for T4-A RO System, 12-Month Lifetime

Model: WD-RT-ALK
Web Code: 20178752
Sold and shipped by | 4.5 seller rating (8 reviews)

Available for deliveryAvailable online only

Delivery times vary by location. Most Marketplace items leave sellers' locations within 2 business days. Allow additional time for shipping.

Seller Return Policy

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Warranty Information

Check with the manufacturer for details.

For Quebec residents: See the Availability Guarantee disclosure in the Specifications section below.

What's included:

  • RT-ALK Replacement Filter

[Compatible Models]: This genuine ALK replacement filter is engineered specifically for the Waterdrop Ultra-Saving Tankless Reverse Osmosis System and is compatible with the Waterdrop T4-A model

[Filtration & Mineralization]: The 1-3μm alkaline mineralizing filter not only reduces odor and bad taste but also enriches water with essential minerals like K⁺, Ca²⁺, Na⁺, Mg²⁺, helping balance stomach acid and enhance your overall wellness. *Tested by a third-party laboratory

[1,056-Gallon High Capacity]: With a lifespan of up to 1,056 gallons — equivalent to roughly 8,000 standard 16.9 oz plastic water bottles — this filter delivers clean, fresh water for up to 12 months under normal use. *Actual service life may vary depending on local water conditions and daily consumption

[3-Second Quick Replacement]: Featuring a twist-and-pull design, the ALK filter can be replaced in just 3 seconds — no tools required. The pre-assembled, all-in-one cartridge ensures a leak-proof seal and easy installation. *After replacement, please reset the system and flush the filter for optimal performance

[A Sustainable Water Solution]: By eliminating the need for up to 8,000 single-use plastic bottles per year, the Waterdrop Reverse Osmosis Water Filter offers a sustainable hydration solution that supports both a healthier home and a cleaner planet

For Quebec residents – Disclosure under the Consumer Protection Act

In compliance with Bill 29, Best Buy and third-party sellers on Best Buy Marketplace do not guarantee the availability of replacement parts, repair services, or maintenance information for any products. Coverage provided through any Best Buy Protection programs and applicable manufacturer warranties, if any, remain in place. Please contact the manufacturer directly for information about their availability guarantee.

Shipping Charges

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Processing Time

Most items ship within 2 business days after an order is placed*. Allow additional time for shipping to your address.
*Please note: If an item you ordered becomes unavailable, you'll be notified and a full refund will be processed within 2 business days.

Shipping Area Restrictions

Shipping is not available in the following areas*:
  • No restrictions in Canada
*Please note: Shipping area restrictions may vary for large items. If an item can't be shipped to your address, we'll let you know during the checkout process.
Product Category
Small appliances, Personal care, and Grooming appliances
Return/Exchange Period
30 days
Condition
Opened

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