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ICS-SIK Replacement Filter for ICS-SI System


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 5 reviews
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!

John Mohan (North Bend, US)
Excellent product.

It does the job.

Hi John, Thank you so much for taking the time to leave a review of our ICS-SIK Replacement Filter for the ICS-SI System! We're thrilled to hear that you're satisfied with the product and that it's sediment and iron effectively.

John VanDamme (Clinton, US)
Always Clear

The filter works for a year without fail. The pre-filter removed during the exchange is always brown and we are grateful that the filtration system works so well. I couldn't imagine having no system.

Thanks for the awesome review, John! We're thrilled the ICS-SIK filter keeps your water clear for a year. The brown pre-filter is proof it's working hard! We're always here if you need anything.