The Adya For Everyone Initiative: Making Clean Water Affordable & Accessible for All

Seconds - 4-Layer Earth Replacement Water Filter

Seconds - 4-Layer Earth Replacement Water Filter

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We have some 4-Layer Earth Filters in our warehouse that have some imperfections but are still perfectly functional, so we're selling them at a HUGE discount - 75% off for a limited time, while supplies last! 

"Seconds" are items that do not meet the standard of quality for our regular retail sales. Reasons for a filter being deemed a "second" may include too much mixing of layer components, chipped ceramic or plastic, some broken ceramic balls, or simply having opened plastic packaging. Seconds sales cannot be combined with other discounts. All seconds sales are final. No exchanges, returns, or refunds. 

The 4-Layer Earth Replacement Water Filter fits in the bottom tank of all drinking water filters sold at  It contains four stages of activated carbon, zeolites, silica sand, and ion exchange resin that are highly effective in the removal of bad odors, tastes, and other compounds.

Activated Carbon
Carbon has been used since ancient times (1200 BC) to purify water. Activated carbon is “activated” by heat and oxygen to create a high surface area which absorbs a wide range of contaminants frequently found in water.

Zeolites are micro-porous, aluminosilicate minerals with a unique cage-like structure that makes them useful in many ways, especially in water filters. Their ion exchange and absorption properties reduce odor and clean heavy metals and other natural compounds from water.

Silica Sand
Silica sand is commonly used in water filters because of its highly absorbent qualities to remove granular contaminants, suspended solids, and colloids.

Ion Exchange Resin
In water purification, ion exchange resin removes poisonous and heavy metal ions, replacing them with more harmless ions, such as sodium or potassium.


  • Long-lasting – Replace once every six months.
  • Provides 500 gallons of clean, great-tasting water.
  • Easy to insert & replace.
  • No maintenance is required.
California & Iowa Customers: Due to certain restrictive water treatment registration laws, all water filters, replacement water filters & parts sold at are not available for residents of California or Iowa. Click here for more information.