Skip to product information
1 of 1

ICS-TPK Replacement Water Filter for ICS-TP System


Treatment Included

T, Taste & Odor P, PolyHalt K, Replacement Kit


Whole House

Filter Size

4.5" x 20"

ICS-TPK - Replacement Filters - Cascadian Water

Product Details

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

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 22 reviews
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

Maureen Eckhardt (Richland, US)
Tastes great

Tastes great

Hi Maureen, thank you for your review, we really appreciate hearing your water tastes great after treatment. Improving taste and odor is one of the primary purposes of your treatment system.

Janet Holt (Snohomish, US)
Great filter

We use to have sand in our water since we have well water. Since the last few years all is good and issues and my 50 gallon fish tank love the great water quality. Thanks Cascadian for making a superior filter. We also like the yearly subscription so we do not have to reorder every time. Thanks Dan and Janet

Dan and Janet, We're delighted to hear that our ICS-TP salt free water softening filter system has exceeded your expectations and provided you with high-quality water for your well water needs. It's great to know that your fish tank is enjoying the benefits too! We appreciate your loyalty and support with our yearly subscription service. Thank you for choosing Cascadian and for your kind words.