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ICS-TPK Replacement Water Filter for ICS-TP System


ICS-TPK cartridge filter replacement kit

The ICS-TPK cartridge filter replacement kit is made specifically for the Cascadian ICS-TP system and is engineered to improve taste and odor, reduce VOCs and soften all the water for every use in your whole home or business. It is an excellent choice for city water and can stand alone or be combined with existing treatment for improved performance.

This revolutionary treatment provides two high performance treatments in one filter cartridge;

  • First treatment is a superior activated carbon filter
    • Improves taste and odor by filtering chlorine
    • Reduces VOCs to further improve water safety
  • After carbon treatment the water passes through PolyHalt® media for the second treatment where it is softened without salt and further conditioned to treat silica and blue copper staining which extends the life of plumbing, fixtures, appliances, windows and glassware etc., by protecting them from damage caused by untreated water.

See product specifications below for more filter details

Other Specs

Filter Size: 4.5" x 20"

Connection: 1" FNPT

Treatment Included: T, Taste & Odor P, PolyHalt 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 24 reviews
Jim Miles (Rancho Cucamonga, US)
Cascadian water filter

I have not installed the most recent purchased filter. This would be the 2nd replacement. The original and 1st replacement did exactly what we had hoped for and that was provide us with soft water for showers that we have been used to for several years! It works great and lasts longer than advertised.

Jim, Thank you for your fantastic 5-star review! Your words about the effectiveness and longevity of the ICS-TPK filter truly mean a lot to us.

We're delighted to know that our salt-free softener and activated carbon combo has become an essential part of your home, and we're especially proud that it's exceeding your expectations with its durability.

We appreciate you taking the time to share your experience, and we hope you continue to enjoy the benefits of soft, clean water for years to come. Thank you for choosing Cascadian Water!

Glenn G. (Kennewick, US)
Kennewick satisfied customer

Replaced old salt water treatment system with the Cascadian ICS-TP system in 2017, and we're extremely satisfied!
The complete system takes up less than a third of the space of the old system, it's much easier to replace the filters than making a mess with the rock salt, their video providing step by step directions of replacing filters is outstanding, the staff is experienced and helpful, and the water is cleaner and softer resulting in less hardwater buildup of our faucets.
With what we've experienced, we'd choose the Cascadian ICS-TP system 100 times out of 100 over ANY other system!

Dear Glenn G., Thank you so much for taking the time to share your fantastic review of the Cascadian ICS-TP system and the ICS-TPK replacement filters! We're absolutely thrilled to hear how happy you are with your purchase, and it's truly rewarding to know that the system has exceeded your expectations in every way.

Your feedback about the space savings, ease of maintenance, and helpfulness of our staff resonates deeply with us. We designed the ICS-TP system with convenience and user experience in mind, so it's wonderful to hear that our efforts have paid off. We're also glad you found our filter replacement video helpful – it's always gratifying to know that our resources are making a difference.

Most importantly, we're delighted to learn that your water is cleaner and softer thanks to the ICS-TP system. Less hard water buildup and better-tasting water are just a few of the benefits our customers enjoy, and it brings us great satisfaction to know that you're experiencing them firsthand.

Your 100 out of 100 endorsement means the world to us, Glenn. We strive to provide our customers with the best possible water filtration solutions, and your positive review is a testament to our commitment.

Thank you again for choosing Cascadian Water. We're confident that you'll continue to enjoy the benefits of the ICS-TP system for many years to come.


The Cascadian Water Team

Greg Minton (Austin, US)
Cascadian Water Filter

Great water filter that filters out chlorine, makes water softer, and is changed once a year. Easy maintenance, reliable, long lasting, and inexpensive. Highly recommended!

Hey Greg! We're beaming with pride knowing that you appreciate the reliability and easy maintenance of the Cascadian ICS-TPK filter. Your satisfaction is our priority. Thanks for the glowing review! - The Cascadian Team