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K Series Carbon Filters (Classic)

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Filtration Stages: 2-Stage Advanced

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Product Details
Product Type Core Filter
Filtration Stage 2-Stage Advanced
Compatibility Purewell K Series & SS Series Filter Systems
Package Quantity 1 Box / 2 Filters
Filter Life Up to 6,000 Gallons per Box
Flow Rate Up to 4 Gallons per Hour with 2 Filters Installed
Use For Gravity Water Filter Systems
Filter Size Approx. 2.20 in × 9.84 in / Φ5.6 × 25 cm
Box Weight Approx. 1.54 lb Net / 1.70 lb Gross
Filtration Option & Item Number

2-Stage Advanced

Item No. K8005
Filter Material
  • Activated Carbon
  • Silver Ion
Key Functions
Removes Bacteria Reduces Chlorine
Use Notes
01

Choose 2-Stage Advanced for everyday gravity water filtration with activated carbon and silver ion media.

02

Designed for Purewell K Series and SS Series gravity water filter systems.

03

Also works as a replacement option for Black Berkey Elements and Travel, Light, Big, Royal, Imperial, and Crown Berkey Series systems.

04

Each box includes 2 filters. Install both filters together for the listed flow rate and rated filter life.

05

Flush filters before first use according to the product instructions.

06

Replace the filters when the rated capacity is reached or when water flow becomes noticeably slower.

Note: Filter life and flow rate may vary depending on source water quality, usage frequency, and maintenance conditions. Always check filter size and system compatibility before purchase. Third-party brand and model names are used for compatibility reference only.
User Guide
Carbon Filter Guide

How to Use the Carbon Filter

Follow these simple steps to prepare, install, and use your carbon filter correctly.

Step 01

Prime the Carbon Filter

Before installation, place the washer and wing nut correctly, then rinse the carbon filter under running water.

1
Remove the wing nut and filter washer, then place them back on the threaded stem in the correct position.
2
Make sure the washer and wing nut are positioned securely before connecting the filter to the faucet.
3
Rinse the carbon filter for at least 60 seconds, or until the water runs clear.
Tip: Priming helps flush loose carbon particles before the filter is installed.
Visual Guide Assemble → Tighten → Rinse
Place the washer and wing nut on the filter stem.
Tighten the wing nut until the parts fit correctly.
Rinse for at least 60 seconds until water runs clear.
Step 02

Install the Carbon Filters

Insert the threaded rod of each carbon filter through the upper chamber, then secure it from below.

1
Place the threaded rod of the carbon filter through a filter washer.
2
Insert the filter into the hole in the upper chamber.
3
From below, add the remaining washer and wing nut, then tighten securely.
Tip: Make sure each filter is stable and sealed before filling the upper chamber.
Visual Guide Upper Chamber → Installed System
Insert filters into the upper chamber and secure from below.
The system is ready after both filters are installed.
Step 03

Important Notice

Follow these guidelines to help maintain normal water flow and avoid improper use.

1
Do not use the filter to filter hot water.
2
This filter cannot remove color from beverages such as cola.
3
This filter cannot reduce the TDS value of water.
4
At the beginning of filtration, keep enough water in the upper chamber to support gravity-fed water pressure.
5
If the filter will not be used for more than 3 days, remove all filter elements and allow parts to dry.
6
Do not use detergents to clean the filter elements, as this may cause clogging.
Please follow the installation guide and use the filter correctly for proper operation.
Care Tips Use Correctly
°
No Hot Water
Use only cold or room-temperature water.
×
No Colored Drinks
Do not use the filter for cola or other colored beverages.
T
Does Not Reduce TDS
This filter is not designed to reduce TDS values.
Keep Enough Water
Sufficient water helps maintain gravity-fed flow.
3
Dry if Unused
If unused for over 3 days, remove filters and let parts dry.
!
No Detergents
Clean without detergents to help prevent clogging.
How It Works

How Gravity Filtration Works

Water flows from the upper chamber through the filter elements by gravity, then collects in the lower chamber and is ready to dispense.

1. Add Water

Pour water into the upper chamber. No electricity or plumbing is required.

2. Gravity Pulls Water Down

Water naturally moves through the filter elements by gravity.

3. Filtered Water Collects Below

Filtered water collects in the lower chamber and is ready to pour from the spigot.

Filter Replacement

Filter Replacement Guide

Replacing filters on time helps your filtration system keep working properly. It also helps maintain water flow, drinking water taste, and everyday use confidence.

!
Track Usage Time & Filter Life

Filter life may vary by water quality, usage frequency, and total water volume filtered.

Rated Filter Life Reached

Replace the filters when they reach the rated lifespan listed for your filter model.

Water Flow Becomes Slower

If filtering takes much longer than usual, clean or replace the filters as needed.

Taste or Odor Returns

If unwanted taste or smell becomes noticeable again, it may be time to replace the filters.

Source Water Matters

Rain, river, stream, or well water may shorten filter life compared with regular tap water.

What to Check Before Replacing Filters
Confirm Compatibility

Choose filters that match your filtration system, filter series, and setup.

Prepare New Filters

Prime, rinse, or flush new filters according to the product instructions.

Check Seals & Washers

Make sure washers, seals, and threaded parts are installed correctly.

Clean the System

Empty and clean the upper and lower chambers before installing new filters.

Replace Sets Together

If your system uses paired filters, replace matching filters together when needed.

Record the Date

Write down the replacement date and set a reminder based on your usage.

Filter & System Replacement Checklist

Use this checklist to choose the right replacement filter for your Purewell system and check whether it may also fit select compatible systems from other brands.

Filter Category Filter Type Fits Purewell Systems Other Compatible Systems
K Series Carbon Filters (Pro) Core Filter SS Series and K Series filtration systems. Select ProOne Big+ / Big II and Berkey BB9-2 style systems.
K Series Carbon Filters Core Filter SS Series and K Series filtration systems. Select ProOne Big+ / Big II and Berkey BB9-2 style systems.
K Series Carbon Filters (Classic) Core Filter SS Series and K Series filtration systems. Black Berkey Elements style systems and select Berkey gravity systems.
K Series Ceramic Filters Core Filter SS Series and K Series filtration systems. Most gravity-fed systems from major brands, including Berkey, ProOne, Alexapure, Waterdrop, Doulton, Boroux, Culligan, and more.
SS Series Square Carbon Filters Core Filter SS Series and K Series filtration systems. Select ProOne Big+ / Big II and Berkey BB9-2 style systems.
SF Series Multi-Functional Filter Core Filter SF Series filtration systems. Select Zero pitchers and dispensers.
BO Series Unique Compound Filter Core Filter BO Series filtration systems only. Not intended for K Series, SS Series, or other gravity filtration systems.
K Series Specialty Add-On Filters Supplemental Filter Use together with K Series or SS Series core filters. Select Travel, Big, Royal, Imperial, Light, and Crown Berkey models as an additional filter option.
Filter replacement frequency directly affects the service cycle of your filtration system. Timely replacement helps support water flow, filtration performance, drinking water taste, and long-term system reliability. Actual filter life may vary based on source water quality, usage frequency, and total water volume filtered.
Video

Carbon Filter Installation & Care Videos

Watch these quick video guides to prepare, install, and maintain your Purewell carbon filters correctly. Proper setup and care help support steady water flow and everyday filter performance.

Pre-Use Preparation

Clean Before Installation

This video shows how to clean or rinse Purewell carbon filters before installation. Preparing the filters before first use helps support a cleaner setup process.

Recommended before first installation Helps prepare new carbon filters for use Useful before installing or replacing filters
Installation Guide

Carbon Filter Installation

This video shows how to install Purewell carbon filters for compatible gravity water filter systems. Follow the guide before first use or when replacing old filters.

Suitable for Purewell carbon filter setup Helps confirm correct filter position Recommended before first use or filter replacement
Maintenance Guide

Carbon Filter Care & Cleaning

This video explains how to maintain Purewell carbon filters, especially when the filter becomes dirty or water flow starts to slow down during use.

Useful when filters become dirty Helps maintain smoother water flow Supports daily care and long-term use

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  • 5 stars: 37 (97%)
  • 4 stars: 0 (0%)
  • 3 stars: 1 (3%)
  • 2 stars: 0 (0%)
  • 1 star: 0 (0%)
S
S.K.
Same as the originals

Finally got around to swapping these into my big berkey. So far they work exactly as the original ones, no complaints! Water tastes the same!

S
S.E.
Nice filter option.

We are using the filter in our Alexapure water filter system (pictured). It fits perfectly, and seems to work better than the previous filters we purchased of a different brand. When setting up initially the instructions say to prime the filter using the kitchen faucet, which didn't work on our setup. We ended up priming it using the outside hose with a nozzle. This ended up working great.

d
d.
The water tastes great!

Well-made and fits my Berkey. The water tastes so much better after using these and filters about the same speed as Berkey brand filters.

I
I.
Great replacement for the overpriced Black Berkey filters!

These non-OEM black water filters are the perfect replacement filters for use in a Big Berkey water filtration system.

At around $40 a pair this is a no-brainer due to the fact that Berkey is no charging almost $200 for a set on their web site and almost $300 on Amazon for a set…

I don’t understand why Berkey feels the need to overcharge people for something that can clearly be made for a much lower price and offered for sale as in this case with these aftermarket filters…

The bottom line is that there is zero difference between these $40 black filters and the overpriced Berkey filters…

B
B.P.
Fits the big Berkey

I have an off-grid site where I pull water straight from an agricultural well and some hose, it's probably fine but this helps me take another step for purity. It fits the big Berkey and all of the clones on the market.

P
P.G.
Purewell Water System

I absolutely love this product. The water tastes great. I would recommend it to anyone who wants to have great tasting water and save money too

B
B.
Good quality

These fit in my knockoff brand gravity filter unit. They appear identical to the name brand and install the same. They say they're good for 6,000 gallons per pair. Hoping to never test that out in a real emergency, but its good to know you have the capacity.

B
B.T.
Impératif

Belle qualité

W
W.W.
Great product!

Great product a little pricey but good quality. Installation is easy. I use them in my purewell,water tastes great.

E
E.B.
Longer lasting compatible carbon water filter replacement

This carbon water filter covers the carbon unit with a porous ceramic pre-filter, which is cleanable. The claim is that this extends the life of the carbon filter over those not pre-filtered. Time will tell whether the claim is true, but the concept seems viable. The product is modestly priced, and seems to do the job; I have cleaned a brown film off the ceramic filter after a few weeks of use. Lab testing would be welcomed to confirm the filtering effectiveness. Compatible with several water filter systems. Mine is a Berkey; installation was easy.

J
J.
Good as Berkey

These filters work just as well as the Berkey brand for a fraction of the cost. I highly recommend them.

G
G.W.
Can't tell the difference from Berkey filters

These turned out to be great! We installed them easily into our Big Berkey filter. They fit perfectly, and look exactly like the name brand filters. The water tastes great. I would say the flow quality is on par with the Berkey filters; I haven't noticed any difference in the time it takes to filter a whole tank of water. Everything seems to work exactly as it should for a much better price than the brand name filters. Very pleased with this product.

E
E.G.
Good basic carbon block filter that fits Berkey filters and all the DIY derivatives.

It took me a bit to review this. I don’t own a Berkey filter, but I do have buckets that do the same thing. This filter does reduce or eliminate bad tastes like chlorine, or iron or sulfur. It does flow faster than expected. I suspect (without cutting it apart) that it is a simple carbon block filter. It does not reduce TdS, nor does it advertise to. Just thought I would mention that. I would not trust this filter to remove harmful bacteria, spores, viruses, etc. it is very good at removing taste and odor from already potable water, though. If that’s what you want, then this filter will work very well for you.

H
H.S.
Quality OEM replacements - Great to have on hand for emergencies

We have enjoyed using a Berkey water filter system for over a decade. Whatever undesirable elements that might be in our tap water, we feel confident that the Berkey system filters it out, and our filtered water tastes better. But it has become harder to source the original black filters lately. This is a nice pack of 2 replacement black filters at a reasonable price. They fit our Berkey system just like the OEM version and were easy to install. They should last for quite a while, since they are made to process up to 6,000 gallons of water.

Everything about this product looks and feels like excellent quality. These filters have been manufactured as a compatible replacement for the original Berkey BB9-2 black filters and have even been tested and certified by NSF/ANSI 42 & 372, so we trust that they have been manufactured to specification. They are made with food-grade natural coconut shell activated carbon to reduce impurities in our water such as arsenic, chlorine, heavy metals, rust, and sediment. Not only can we use these for daily clean water, but it is important to have these on hand for emergencies like floods or hurricanes, when the tap water might be further contaminated.

l
l.
They work as well as the original

These work as well as the original and way cheaper.

B
B.F.
Just as Good as the More Expensive Brands

These fit perfectly in our Big Berkey water filter and seem to be doing the job very well! I can't tell any difference between them and the more expensive versions. The water tastes great and these filters seem to function perfectly.

d
d.
The water tastes great!

Well-made and fits my Berkey. The water tastes so much better after using these and filters about the same speed as Berkey brand filters.

i
i.
Great replacements filters

Fit Berkey water filtering system well and do the job. Easy to install.

H
H.
The filters fit my Berkey, the water tastes great, and I am happy.

I am happy! It fit my Berkey and the spring water loaded with heavy metals tastes great after going through the .Purewell activated black carbon water filters.

My Berkey Imperial takes 4 of them and they include a gasket to rinse the filter out at the sink prior to use. About 24 hours after my first use I smelled the tank to check for mold or bad odors and did not smell anything.

They function well and I am happy.

H
H.
Workes with my Berkey, water tastes great, no mold smell.

NICE! This Purewell water filter fits my Berkey Imperial and the most important thing is that my off-grid piped spring water has NO FLAVOR after going through the filter. No bad smells, no mold issues, etc. It seems to be working perfectly and I enjoy drinking the water.

It is a NSF/ANSI 42&372 certified water filter replacement for the Berkey BB9-2 Black Elements, Activated Carbon Filters and is compatible with Berkey gravity filtration systems.

My Berkey takes 4 of these filters and all is well. About 24 hours after my first use I smelled inside the filter tank area to check for mold smells and everything smelled clean.

B
B.P.
Fits the Big Berkey

This fits the Big Berkey and should fit the British Berkfeld and all of the clones available now.

I
I.
Perfect replacement filters for a Big Berkey water filtration system, just as good as OEM!

These non-OEM black water filters are the perfect replacement filters for use in a Big Berkey water filtration system.

At around $40 a pair this is a no-brainer due to the fact that Berkey is no charging almost $200 for a set on their web site and almost $300 on Amazon for a set…

I don’t understand why Berkey feels the need to overcharge people for something that can clearly be made for a much lower price and offered for sale as in this case with these aftermarket filters…

The bottom line is that there is zero difference between these $40 black filters and the overpriced Berkey filters…

A
A.C.
Fits great in my berkey water filter set up

These filters fit just like the generic filters I've been using for years. The parts are identical and it installs without any issues.

While I have no way of knowing if it's filtering as well as it claims, the water smells and tastes like it usually does after going through the berkey, so I'm satisfied.

It

M
M.
Works as well as the original

These filters work as well as the original in reducing chlorine it seems but we tried it in a metro area using chloramine and there is still a strange aftertaste as with all filters not made for chloramine, but that's not the filters' fault. It's best to stay away from chloramine altogether as it kills fish and our beloved goldfish.

C
C.R.
Fits perfectly and works great

These filters fit my Berkey perfectly. They passed the red dye test with no problem and the water tastes clean and delicious. Installation was easy and the quality seems just as good as the originals but at a much better price. Very happy with them so far.

I received this item through the Vine Program, but I always give my honest, unbiased opinion so you can shop with confidence.

K
K.
Berky replacement

No issues, comes with 2 filters for stainless steel gravity systems.

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