Undersink Water Filtration Systems

DiscountFilterStore offers a variety of underksink water filtration systems. Whether you are looking for a twist and lock replacement filter, a replacement housing sump, or a full flegded 3 or 4 stage undersink filter system we are sure to have the solution you need.

Use the filter options below to further refine your search, if you need assistance please reach out to our water experts at 1-800-277-3458 and we will be able to offer recommendations to meet your needs.

If you are looking for a more portable water filter system please see our Countertop Water Filtration Systems or Water Filter Pitchers & Dispensers pages.

29 Products found

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  1. 4-Stage Ultra-Filtration Hollow Fiber Drinking Water Filter System by Tier1 (Quick Change)

    Price $138.99 List Price Price $198.99 Save 30%
    Free Shipping
  2. 153128 Pentek Filter Housing Sump - Clear

    Price $37.99 List Price Price $53.99 Save 29%
  3. W9330958 Doulton UltraCarb Undersink Ceramic Candle Filter System

    Price $119.99 List Price Price $171.99 Save 30%
    Free Shipping
  4. H-300 Everpure Under Sink Filter System

    Price $397.99 List Price Price $568.99 Save 30%
    Free Shipping
  5. US-EZ-1 Culligan Level 1 Easy-Change Undersink Filter System

    Price $61.99 List Price Price $88.99 Save 30%
    Free Shipping
  6. 3US-AS01 Filtrete Undersink Filter System

    Price $52.99 List Price Price $75.99 Save 30%
    Free Shipping
  7. SLIM-38-PR5 Pentek Whole House Slim 5 inch Filter Housing

    Price $28.99 List Price Price $40.99 Save 29%
  8. 153029 Pentek Filter Housing Sump

    Price $42.99 List Price Price $60.99 Save 29%
    Free Shipping
  9. US-ST04 Tier1 Undersink Smart Tap System

    Price $58.99 List Price Price $84.99 Save 30%
    Free Shipping
  10. W385-PR American Plumber Undersink Compact Filter System

    Price $34.99 List Price Price $49.99 Save 30%

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