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ICS-HK Replacement Water Filter for ICS-H System


Treatment Included

H, H2S K, Replacement Kit


Whole House

Filter Size

4.5" x 20"

ICS-HK - Replacement Filters - Cascadian Water

Product Details

ICS-HK cartridge filter replacement kit

The ICS-HK cartridge filter replacement kit is designed specifically for the Cascadian ICS-H filter system and engineered to improve hydrogen sulfide (rotten egg) taste and odor problems from all the water for every use in your whole home or business. It is an excellent choice for well water. 

  • Reduces and often completely eliminates foul smelling H2S (rotten egg) odors
  • An excellent pretreatment for any of our other systems when H2S exists in well water

For the best treatment we recommend following the ICS-HK with the ICS-STPK. 

Rely on our expertise to deliver the simplest water treatment

  • Eco-Friendly

    No water waste

  • Legal Everywhere

    Our filters can be used where salt softeners are banned

  • Easy Maintenance

    Change filters once or more per year

  • 60 Day Guarantee

    Return it, not questions asked

  • Filter Subscriptions

    Purchase your first replacement filters after a year with your system and select the subscription option to save time and 10% off.

    Filter Subscription
  • Product Specification

    Each product has specific capabilities and unfortunately can't treat every type of water. Find details on the specification.



Where does ICS go in my Home?

Where it can fit, and where it can easily get access to your home's water source. This is typically a garage, crawlspace, or even a closet. If you have questions a plumber would be able to help you find the best spot. During maintenance you'll need to fit a bucket and have enough space to turn the sump wrench which comes with your system.

How often do I replace the filters?

Most people replace their filters once per year, or sooner if they start seeing issues with their water again. Learn about water issues here

What is the return policy?

If you are unsatisfied within 60 days of purchase, return the housing and we'll refund your purchase no questions asked.

How fast do you ship?

We typically ship same business day if the order is placed before 2 pm PST using UPS ground.

Does this include housing o-rings?

No, the replacement kits do not come with o-rings.

Customer Reviews

Based on 2 reviews
Toby Cyr (Installer)
It works flawlessly

We installed our first ICS H2s filter. We put it behind a Nitro System that was randomly allowing H2s by. It works flawlessly. Thanks for the new ICS systems. We bought all 4 for our inventory.

Jason Te Slaa (Installer)
The sulphur smell and taste was completely neutralized by the filter

We have had wonderful feed back from our customers. We installed one where the sulphur smell and taste was completely neutralized by the filter. It was so bad the odor could be detected all over the home when the water was ran. Right after I installed the filter I tried the water from the hose and could not taste the sulphur at all.