ICS-SIK Replacement Filter for ICS-SI System

Cascadian Water  |  SKU: ICS-SIK

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ICS-SIK cartridge filter replacement kit

The ICS-SIK Sediment and Iron cartridge filter replacement kit is designed specifically for the Cascadian ICS-SI and engineered to filter sediment, iron and manganese from all the water for every use in your whole home or business. 

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

  • First treatment is a multimicron depth sediment filter to protect and clarify
  • Second treatment is a iron and manganese filter to stop orange/red and brown/black stains

Other Specs

Filter Size: 4.5" x 20"

Connection: 1" FNPT

Treatment Included: S, Sediment I, Iron K, Replacement Kit

  • 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, no questions asked

Frequently Asked Questions

Where does the ICS system 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.

Rely on our expertise to deliver the simplest water treatment

Customer Reviews

Based on 7 reviews
David Rutter (Redmond, US)
Replacement filters and site visit

Devon came to our house to review our system and was able to identify a new filter that would help with hardness of water. The water is indeed softer less water spots in the stainless sinks. I’m extremely happy with the results and Cascadian Water!

Thank you so much for the fantastic review! We're thrilled that Devin was able to assess your system, recommend the ICS-SIK filter, and make a real difference in your water quality. It's great to hear you're experiencing softer water and fewer water spots on your stainless steel sinks – that's exactly the kind of result we love to see.

Your satisfaction is our top priority, and we're so glad you're happy with both the results and your experience with Cascadian Water. We appreciate your business and are always here if you need anything in the future.

Cheers to enjoying your softer water!

John Vandamme
Two Years of Crystal-Clear Water: A Testament to ICS-SIK's Effectiveness

Our Cascadian Water filter (ICS-SIK) for the (ICS-SI) filtration system has been preserving water for us for the past two years. It is amazing how clear the water is all of the time; when we change out the new white pristine filter with the brown-stained pre-filter each year, we appreciate this hard-working system and don't need to think about it at all.

Thank you for sharing your positive experience with the ICS-SIK filter and ICS-SI system! We're thrilled to hear that it's been consistently delivering clear, clean water to your home for two years.

The contrast between the new and used filters is a powerful visual reminder of how hard the system works to protect your water quality. We're so glad you can enjoy the peace of mind that comes with knowing your water is taken care of.

Kathleen Russell (Port Orchard, US)
Great filter that takes the iron out of our water

My unfiltered water rusted my washing machine and stained the toilet and tub.
The process has been corrected.

Dear Kathleen, We are so grateful for your updated 5-star review and incredibly happy to see the photo of the ICS-SI filter in action! It's clear that it's making a big difference in the quality of your water, and we're thrilled to hear it's preventing rust and stains in your appliances and keeping your home sparkling clean. We understand the frustration of dealing with rusty appliances and stains, and we're proud that our product has helped solve that problem for you. If you ever have any questions or need assistance with your filter, please don't hesitate to contact us. We're always happy to help!