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Purewell K8201 Portable Outdoor Water Filter with Hollow Fiber Ultrafiltration for Camping & Hiking

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0.01μm ULTRAFILTRATION ACCURACY

1000L LONG-LASTING FILTRATION

SIMPLE STRAW-ONLY OPERATION





Ask about Purewell K8201 Portable Outdoor Water Filter with Hollow Fiber Ultrafiltration for Camping & Hiking

Product Details

About this item

  • ULTRALIGHT & COMPACT TRIANGULAR DESIGN: Weighing only 30 grams and measuring just 2 cm in diameter and 15 cm in length, this triangular water filter straw is incredibly easy to carry in your hand, pocket, or survival kit. The ergonomic triangular shape provides a comfortable, secure grip, making it a truly portable water filter for any outdoor adventure.
  • 1000L LONG-LASTING FILTRATION: This survival water filter straw delivers up to 1,000 litres of safer drinking water. Built with a hollow-fibre ultrafiltration membrane, it removes up to 99.9999% of waterborne bacteria, parasites, microplastics and turbidity, while retaining beneficial minerals for healthier hydration.
  • 0.01μm ULTRAFILTRATION ACCURACY: The advanced ultrafiltration membrane has a pore size of just 0.01 microns — significantly finer than many standard 0.1-micron filters. It provides reliable personal water purification without the use of chemicals, batteries or moving parts, making it an ideal emergency water filter straw.
  • SIMPLE STRAW-ONLY OPERATION: Designed for direct drinking, this filter straw has no threaded connectors or extra accessories to manage. Simply place the inlet end into a water source and sip through the straw. It works well with shallow streams, lakes, water bags or cups, and is perfect as a personal water filter for camping, hiking, hunting, fishing, travel and emergency preparedness.
  • PREMIUM FOOD-GRADE MATERIALS & OUTDOOR READY: Crafted from BPA-free food-grade plastic and durable filtration media, this lightweight water purifier straw is built to withstand outdoor use. Whether you are backpacking, trekking, boating or building a hiking survival kit, this filter straw is a dependable addition to your gear.
User Guide
Installation Guide

How to Set Up Your Countertop Gravity Water Filter System

Follow these simple steps to assemble the system, install the core filters, flush before first use, and prepare it for daily use.

Prepare and Clean the Parts

Before assembly, check the main parts and clean the system components.

  • 1
    Wash Your Hands Handle the system with clean hands before setup.
  • 2
    Check Included Parts Make sure the chambers, lid, spigot, stand, and core filters are ready.
  • 3
    Clean Before Assembly Rinse the chambers and accessories before first use.
Note: Use cold or room-temperature water only. Do not use hot water.

Assemble the Lid Knob

Attach the lid knob to the lid and secure it with the included hardware.

  • 1
    Place the Lid Knob Insert the lid knob into the center hole of the lid.
  • 2
    Add Washer and Gasket Place the washer and gasket in the correct position.
  • 3
    Tighten the Screw Fasten the knob until it feels stable.
Tip: Do not overtighten. The lid knob should feel secure but not forced.

Install the Basic Spigot

Install the basic spigot into the lower chamber before stacking the system.

  • 1
    Insert the Spigot Place the spigot through the lower chamber hole with the gasket and washer.
  • 2
    Add the Inside Parts Place the remaining washer and gasket from the inside of the chamber.
  • 3
    Tighten the Hex Nut Use the wrench to secure the spigot vertically.
Before filling: Make sure the spigot is closed to help prevent leaking.

Install the Core Filters

Use the required number of core filters for your system model.

  • 1
    Insert the Core Filters Place the core filters through the holes in the upper chamber.
  • 2
    Secure the Filters Use the filter washer and wing nut to hold each core filter in place.
  • 3
    Check Stability Make sure each core filter is firmly installed before adding water.
Note: This guide uses “core filters” only. Filter type and quantity may vary by system option.

Stack the Chambers and Stand

Set the system together in the correct order before flushing.

  • 1
    Attach the Anti-slip Mat Place the anti-slip mat on the bottom of the lower chamber.
  • 2
    Place the Lower Chamber on the Stand Set the lower chamber securely on the stand.
  • 3
    Add the Upper Chamber and Lid Place the upper chamber into the lower chamber, then cover it with the lid.
Stability check: Make sure the system sits flat and stable before filling water.

Flush Before First Use

Flush the system before drinking water from it for the first time.

  • 1
    Fill the Upper Chamber Add water and let it move through the core filters.
  • 2
    Discard the First Batch Pour out the first filtered water from the lower chamber.
  • 3
    Repeat 2–3 Times After flushing, the system is ready for regular use.
Tip: Fill the upper chamber as much as possible at the beginning to support gravity-fed filtration.
System Type Countertop Gravity System
Filter Reference Core Filters
First Use Flush 2–3 Times
Water Temperature 40°F–100°F / 4–37°C
How It Works

How the Filter System Works

Water is added to the upper chamber and moves through the center filter by gravity. After filtration, water collects in the lower chamber and is ready to dispense from the spigot.

1. Fill the Upper Chamber

Add water to the top chamber. The system works without electricity, plumbing, or pressure.

2. Gravity Moves Water Through the Filter

Water naturally flows downward through the center filter element, where the filtration process takes place.

3. Filtered Water Collects Below

After passing through the filter, water collects in the lower chamber for storage and daily use.

4. Dispense When Needed

Open the spigot to pour filtered water for drinking, cooking, or everyday hydration.

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.
List

System Package

Main parts included for the countertop gravity water filter system.

  • Upper Chamber× 1
  • Lower Chamber× 1
  • Lid× 1
  • Anti-slip Mat× 1
  • Stand× 1
  • User Manual× 1

Basic Spigot Parts

Parts used to install the basic stainless steel spigot.

  • Basic Spigot× 1
  • Spigot Gasket× 2
  • Beveled Washer× 2
  • Spigot Hex Nut× 1
  • Wrench× 1
  • Screwdriver× 1
  • Plastic Spigot× 1
  • Silicone Plug× 1

Selected Filter Package

Your package includes the BO Series Carbon Filters selected with this system. The filter option may vary based on your product selection.

  • Selected Filters SF Series Core Filter
  • Package Quantity 1 Box / 1 Filter
  • System Use Install One Filter Only
Note: The final filter type is based on the filter option selected before checkout.
Video

2.25 Gallon Water Filter System Installation Video

Watch this step-by-step guide to set up your Purewell 2.25 gallon water filter system and install the filter element in the correct position before first use.

Installation Guide

2.25 Gallon System Setup & Filter Placement

This video shows how to assemble the Purewell 2.25 gallon water filter system, including how to place and install the filter element properly for daily filtration.

Recommended before first use Helps confirm correct filter placement Covers basic system setup and assembly Useful when installing or replacing the filter element

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.

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