Costco Water Filters

Costco's water filtration lineup centers on under-sink reverse osmosis systems, such as the Pure Blue 1:1, Delta Clarifi tankless, Aquverse and Brondell Circle, plus Hahn whole home systems and Brita and PUR pitcher packs.

How to compare

  • Certifications: check NSF/ANSI 58 for RO and the contaminant list on each data sheet.
  • Replacement filters: confirm you can buy the right cartridges later, and their yearly cost.
  • Warehouse-only items: some systems, such as certain RO kits, appear only in warehouses.
  • Installation: Costco items generally include standard fittings. Check for a drain saddle and faucet.

See Costco Reverse Osmosis Systems, Costco Whole House Water Filters and Costco Water Filter Pitchers.

FAQs

Does Costco sell water filtration systems?

Yes. Costco sells under-sink reverse osmosis systems from brands such as Pure Blue H2O, Delta, Aquverse and Brondell, and has sold Hahn whole home systems, along with Brita and PUR pitcher and filter packs. Availability differs between Costco.com and warehouses, so check both.

Are Costco RO systems good?

Several are well-regarded and carry NSF/ANSI certifications, but quality and features vary.

Does Costco sell whole house water filters?

Costco's whole house selection is limited and changes, with Hahn whole home systems appearing online at times and some in-home dealer programs. Compare capacity, flow rate and certifications when choosing between them.
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