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.

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  1. 153128 Pentek Filter Housing Sump - Clear

    Price $39.99 List Price Price $56.99 Save 29%
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  2. SLIM-38-PR5 Pentek Whole House Slim 5 inch Filter Housing

    Price $29.99 List Price Price $42.99 Save 30%
  3. 153029 Pentek Filter Housing Sump

    Price $45.99 List Price Price $65.99 Save 30%
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  4. 158110 Pentek Filter Housing - Clear

    Price $27.99 List Price Price $39.99 Save 30%
  5. SLIM-CLEAR-14-WPR5 Pentek Whole House Slim 5 inch Filter Housing

    Price $34.99 List Price Price $49.99 Save 30%
  6. SLIM-14-WPR5 Pentek Whole House Slim 5 inch Filter Housing

    Price $28.99 List Price Price $40.99 Save 29%
  7. PENTEK-SLIM-PR10-JG38 Pentek Undersink Filter 10 inch Housing

    Price $25.99 List Price Price $36.99 Save 29%
  8. 158117 Pentek Slim Line Filter Housing - Clear

    Price $28.99 List Price Price $40.99 Save 29%

9 Items

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