Drinking Water Filters

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19 Products

Not sure which one is right for you?

Answer three quick questions and we'll narrow this collection down to your best three.

Where do you want the filter?

Ordering from Rein Water

What to expect

  • Ships direct from the manufacturer

    Every order is packed and shipped by the brand that makes it. We submit your order to them within 2 business days.

  • Estimated delivery on product pages

    Brondell, Crystal Quest and Waterdrop product pages show a dated delivery window under the buy button before you order.

  • Returns by brand

    Each manufacturer sets its own return window and restocking fee. Check the terms for your brand before you order.

    Return terms by brand

  • Tracking as soon as it ships

    We email your tracking number within 1 business day of the shipment leaving the manufacturer.

How to choose a drinking water filter

These systems filter through one or more cartridges without an RO membrane, so there is no reject water and no drain line. This collection runs from single-cartridge countertop filters to seven-stage cartridge units, plus a gravity-fed glass purifier, an under-sink three-stage system and two ultrafiltration units, from Crystal Quest, Waterdrop, Brondell and The Water Machine, with 1 to 7 stages.

Who it is for

Homes that want a simple filter at the kitchen tap, kitchens that cannot fit a reverse osmosis system under the sink, and anyone who would rather not send water to the drain. Faucet-connected countertop units suit renters; the gravity unit suits a counter with no faucet nearby.

What to compare

  • Filter type: carbon, ceramic, multi-media, specialty cartridges (alkaline, arsenic, nitrate, lead, fluoride) or ultrafiltration. Product pages list the media in each stage.
  • Stages: a single cartridge is simplest to maintain; double and triple housings separate the jobs.
  • Install: countertop faucet-connected with a diverter valve, gravity fill-by-hand, or under-sink with its own faucet.
  • Flow rate: cartridge filters run at line pressure; the product page lists the rated GPM.
  • Rated capacity in gallons and the replacement SKU, listed on each product page.

Ships direct from the manufacturer.

Common questions

There is no RO membrane, drain line or pressurized tank, so installation is simpler and no water is sent to the drain.

Most Crystal Quest countertop systems connect to a standard kitchen faucet with a diverter valve. Pull-out and sprayer faucets usually need an adapter; check the product page.

A hollow-fiber membrane with a larger pore size than reverse osmosis. It runs on line pressure with no tank and no reject water.

Systems in this collection currently range from about $50 to about $350 before shipping. Each product page shows the current price and the replacement cartridge.

None of the filters in this collection lists PFAS reduction. For PFAS, look at reverse osmosis systems whose product page lists a PFOA and PFOS claim under NSF/ANSI 58.