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Filtros complementarios especiales serie K

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Añada filtración específica a su sistema de agua por gravedad con filtros complementarios especiales K Series. Elija una opción de 5 etapas para una mayor reducción de fluoruro o una opción alcalina de 3 etapas diseñada para elevar el pH. Estos filtros suplementarios deben combinarse con filtros principales compatibles Purewell K Series o SS Series. Cada caja incluye dos filtros.

Ask about Filtros complementarios especiales serie K

Product Details
Tipo de producto Filtro complementario
Opciones de filtración 5 etapas / 3 etapas
Emparejamiento necesario Filtro central
Cantidad del paquete 1 caja / 2 filtros suplementarios
Vida útil del filtro Hasta 200–1.000 galones por caja
Caudal Depende del caudal del filtro central y la presión del agua
Serie K Series
Tamaño del filtro Aprox. 2,76 in × 6,30 in / Φ7 × 16 cm
Uso importante Solo filtro adicional. No está destinado a usarse solo.
Opciones de filtración & números de artículo

Reducción de flúor de 5 etapas

N.º de artículo K8003
Material del filtro
  • Primer algodón PP
  • Carbón activado
  • Segundo algodón PP
  • Material de reducción de fluoruro
  • Tercer algodón PP
Funciones clave
Reduce el cloro Reduce el fluoruro Filtración adicional
Detalles de rendimiento
Vida útil del filtro Hasta 1.000 galones por caja
Peso de la caja Aprox. 1,39 lb neto / 1,52 lb bruto

Filtro alcalino de 3 etapas

N.º de artículo K8002
Material del filtro
  • Primer algodón PP
  • Material alcalino
  • Segundo algodón PP
Funciones clave
Eleva el nivel de PH Filtración adicional
Detalles de rendimiento
Vida útil del filtro Hasta 200 galones por caja
Peso de la caja Aprox. 1,39 lb neto / 1,52 lb bruto
Notas de uso
01

Este es un filtro complementario y debe usarse junto con filtros principales compatibles K Series o SS Series.

02

Elija la reducción de fluoruro de 5 etapas si desea una reducción adicional de fluoruro después de la etapa central del filtro.

03

Elija el filtro alcalino de 3 etapas si desea una capa adicional de material alcalino diseñada para elevar el nivel de PH.

04

También funciona con los modelos Berkey Travel, Big, Royal, Imperial, Light y Crown como opción adicional de filtro por gravedad.

05

No apriete en exceso durante la instalación. Asegúrese de que el filtro complementario esté bien fijado al vástago del filtro principal.

06

Reemplace los filtros complementarios cuando se alcance la capacidad nominal o cuando el flujo de agua se vuelva notablemente más lento.

Nota: este producto es un filtro complementario adicional y no está diseñado para reemplazar por sí solo el filtro principal. La vida útil del filtro y el caudal pueden variar según la calidad del agua de origen, la presión del agua, el estado del filtro principal, la frecuencia de uso y las condiciones de mantenimiento. Los nombres de marcas y modelos de terceros se utilizan solo como referencia de compatibilidad.
User Guide
Supplemental Filter Guide

How to Use the Supplemental Filter

Follow these simple steps to prime, install, and use the supplemental filter correctly with your core filters.

Step 01

Prime the Supplemental Filter

Before installation, remove the red sealing caps, place the priming washer on the inlet side, and rinse the filter under running water.

1
Remove the red sealing caps from both ends of the supplemental filter.
2
Place the black priming washer on the inlet side of the supplemental filter.
3
Connect the filter to the faucet outlet using the priming washer, then flush for at least 120 seconds or until water runs clear.
Tip: Priming helps flush loose particles before the supplemental filter is connected to the core filter.
Visual Guide Remove Caps → Add Washer → Rinse
Remove the sealing caps from both ends.
→
Place the priming washer on the inlet side.
→
Flush for at least 120 seconds until water runs clear.
Step 02

Install Below the Core Filters

Attach each supplemental filter to the stem of the core filter by turning it clockwise until secure.

1
Unscrew the wing nut at the bottom of the upper chamber used to secure the core filter.
2
Hold the core filter firmly and attach the supplemental filter to the core filter stem by turning it clockwise until secure.
3
Fill the upper chamber with water and discard the first batch of filtered water.
Note: Some filters may require additional force to thread onto the stem. Do not overtighten.
Visual Guide Unscrew → Attach → Ready
Unscrew the wing nuts below the core filters.
→
Turn clockwise to attach the supplemental filters.
→
Fill with water and discard the first batch after installation.
Step 03

Important Notice

Follow these care tips to help maintain proper use and avoid clogging, poor flow, or incorrect filtration.

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
This filter may reduce the filtration flow rate by 15–20%.
5
When the lower chamber is full, the filter may be submerged. This is normal and safe for use.
6
If unused for more than 3 days, remove all filter elements and allow the parts to dry.
7
Do not use detergents to clean the filter elements, as this may cause clogging.
If you notice clogging, strange taste, broken filters, or poor filtration, please contact us by email.
Care Tips Use Correctly
°
No Hot Water
Use only cold or room-temperature water during filtration.
×
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.
≈
Slower Flow
Filtration flow may be reduced by about 15–20%.
✓
Safe if Submerged
It is normal if the filter is submerged when the lower chamber is full.
3
Dry if Unused
If unused for over 3 days, remove filters and allow parts to dry.
!
No Detergents
Clean without detergents to help prevent clogging.
How It Works

How the Filter System Works

Water moves through the system by gravity. It first passes through the upper filter elements, then continues through the lower add-on filters before collecting in the lower chamber for dispensing.

1. Add Water to the Upper Chamber

Pour water into the top chamber. The system works without electricity, pressure, or plumbing.

2. Water Passes Through the Core Filters

Gravity pulls water downward through the upper filter elements as the first filtration step.

3. Add-On Filters Provide Extra Filtration

Water then continues through the lower add-on filters to support additional filtration performance.

4. Filtered Water Collects Below

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

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

Specialty Add-On Filter Videos

Watch these quick video guides to prepare and install Purewell Specialty Add-On Filters correctly. Proper preparation and installation help support smoother setup and consistent daily use.

Installation Guide

Specialty Add-On Filter Installation

This video shows how to install Purewell Specialty Add-On Filters with a compatible gravity filtration setup. Follow the guide to help confirm the correct filter position before use.

Suitable for Specialty Add-On Filter setup Helps confirm the correct installation direction Recommended when adding or replacing add-on filters
Pre-Use Preparation

Clean Before Installation

This video explains how to clean or rinse Purewell Specialty Add-On Filters before installation. Preparing the filter before first use helps reduce loose particles and supports a cleaner setup process.

Recommended before first installation Helps prepare the filter for first use Useful for cleaner setup and daily performance

NSF Certified for Your Health

Independently tested to meet NSF/ANSI 42 & 372 standards, the highest level of trust in water filtration.

Lead-Free Guarantee (NSF/ANSI 372)
Certified lead-free materials to keep your water worry-free.

You Also Like

These add-on filters effectively remove fluoride and improve water taste when attached to carbon filters. Customers said "water tastes great" and praised the "great value." However, some reported compatibility issues with certain systems, particularly threading problems that prevented proper installation. Filters work well with gravity systems.

  • The filtered water is wonderful & has no odd taste or smell. I'm saving money by not buying bottles
  • Well-made and fits my previous black carbon filter. The water tastes so much better
Quality (positive)Taste (positive)Installation (positive)Filters (positive)Fluoride (positive)
  • 5 stars: 17 (94%)
  • 4 stars: 1 (6%)
  • 3 stars: 0 (0%)
  • 2 stars: 0 (0%)
  • 1 star: 0 (0%)
A
Andrew
Almost perfect

Great filters. Pity that I couldn't make a yearly subscription!

A
Anonymous
It works

These come well packaged and wrapped in plastic. They work well and as expected. I screw them by threads to carbon filters. Water that comes out looks clean, and not dirty like stream/creek water so I can’t speak about the quality…but, they appear to work well.

K
K.
Fits perfectly

No issues, fits my carbon filter of stainless steel gravity systems.

B
Bruce
Fits my Berkey

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

R
Roy
The water tastes great!

Well-made and fits my previous black carbon filter. The water tastes so much better after using these fluoride removal filters.

B
Bloominghen
Nice fluoride removal filter

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.

H
Hugs777
I am happy!

It fit my black activated carbon water filters. I smelled the tank to check for mold or bad odors and did not smell anything. They function well and I am happy.

W
William
Great product!

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

J
Jeff
I highly recommend them

These filters work just as well as the Berkey brand for a fraction of the cost.

J
Judy
Quality

My tap water is very bad. Lots of fluoride so I’m happy to get a month out of these filters but the water that is filtered is very good. I’m sure the filter would last longer if the water wasn’t so mineralized

A
Amazon
Great filters

Works as described and is pretty quick filtering the water. Water has no taste, just water. And the dog loves it.

S
Shelly
Works great!

The filtered water is wonderful & has no odd taste or smell. I'm saving $$$ by not buying bottles & it's convenient to be attached to my black carbon filters. The filter looks nice! Would recommend

V
Vicky
GREAT WATER FILTER

Easy to be attached to carbon filter and does a great job...

M
Mandy
Great product

Great filters work as well as the much more expensive name brand ones.

H
Hody
Good

Easy to install. Interesting design.

B
B.
Good!

Can be attached to my Purewell black carbon filter easily. Fits well!

W
William
Love Purewell

They work great. Love my Purewell.

d
deanna

Purewell - Fluoride Reduction Element PF-2

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