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ICS-STK Replacement Water Filter for ICS-ST System


Treatment Included

S, Sediment T, Taste & Odor K, Replacement Kit


Whole House

Filter Size

4.5" x 20"

ICS-STK - Replacement Filters - Cascadian Water

Product Details

ICS-STK cartridge filter replacement kit, 

The ICS-STK cartridge filter replacement kit is designed specifically for the Cascadian ICS-ST and engineered to filter sediment, improve taste and odor and reduce VOCs from all the water for every use in your whole home or business. It is an excellent choice for soft city water. 

Not for Hydrogen Sulfide (rotten egg) odor. If you are looking to reduce sulfur H2S hydrogen sulfide odor please see our ICS-H. 

Contains two cartridge filters;

  • Filter 1 is a multimicron depth sediment filter to protect and clarify
  • Filter 2 is an activated carbon filter
    • Improves taste and odor by filtering chlorine
    • Reduces VOCs to further improve water quality


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.

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