Purefast® Countertop

It is important to follow the 4-step filter preparation instructions included in the Purefast User Guide. This easy 5-minute conditioning process will ensure smooth filtration and fresh tasting PFAS-free water:

Step 1. Run small streams of tap water through the top of the filter for 15 seconds. Turn the filter upside down and allow water to flow through each bottom screen for 15 seconds – a total of 60 seconds.

Step 2. Fill your pitcher with water and hold the filter under water. Gently shake and tap the filter against the interior wall of the pitcher to fully wet the media for about 2 to 3 minutes, or until you no longer see air bubbles coming out of the filter.

Step 3. Insert the filter into the pitcher reservoir by lining up the groove in the filter with the notch in the reservoir (if applicable). Gently press the filter down to secure the filter in the reservoir.

Step 4. Before use, fill the reservoir with tap water and discard the filtered water. For best results, avoid pouring tap water directly on top of the filter. Repeat this step two to three times.

For the best hydraulic performance, it is recommended to recondition the filter every 30 days. Larger households and those using the Ultramax pitcher model may need to recondition the filter every 2 weeks. To recondition, remove the filter and shake gently before following conditioning steps 1-3 (above).

Purefast filters are certified for 65 gallons of water, which can last up to 3 months for a family of 2. This is based on the CDC estimation that one person drinks 44 oz. of tap water per day, or 1,320 oz. (10 gallons) per month.

For an average water drinker:

One person
Up to 6 months

Family of Two
Up to 3 months

Family of Four
Up to 1.5 months

Purefast is designed to work with Brita pitchers that use standard filters, such as the following:

• Soho (5 cup)
• Space Saver(6 cup)
• Tahoe (10 cup)
• Ultramax (27 cup)

PFAS and Chlorine. In addition to PFAS removal, Purefast is also certified by NSF for chlorine (taste and odor) removal.

Mineral Ions. Purefast does not remove (leaves intact) inorganic ions like fluoride and healthy mineral ions.

Please click this link.

Cyclopure internal testing demonstrates reduction of 11 PFAS (PFOA, PFOS, PFHxA, PFHxS, PFNA, PFDA, PFHpA, PFPeA, PFBS, PFBA, HFPO-DA (GenX)) to non-detect for 65 Gallons capacity based on influent concentration of 40 ppt per PFAS.

Sustainability is one of our top priorities. Purefast will do the work to achieve ZERO PFAS in your drinking water. If you return your used filter to us, we will ensure that ZERO PFAS waste goes to the environment.

Each Purefast filter comes with a pre-paid mailer to return used cartridges to our lab for safe disposal. When you open the package, check the mailer and store it where you will remember, such as a catchall drawer in the kitchen.

When the filter is fully used, place the spent cartridge in the mailer, seal it, and drop off the package at the post office to return. Postage is already paid!

Each Purefast filter comes pre-conditioned for smooth filtration. You may find some moisture or a small amount of water when you open the packaging. This is normal.

For short term storage (1-2 days), we recommend leaving the filter in the pitcher (with filtered water) and storing the pitcher in the refrigerator.

For long term storage (3+ days), we recommend leaving the filter in the pitcher (no water in the pitcher) and storing the pitcher in the refrigerator.

Before the next use, you may need to recondition the Purefast filter by following the steps in Q1.