ICS-PHK Replacement Water Filter for ICS-PH System

Cascadian Water  |  SKU: ICS-PHK

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ICS-PHK cartridge filter replacement kit for the ICS-PH system. Has double the treatment as the ICS-P.

The ICS-PHK cartridge filter replacement kit is made specifically for the Cascadian ICS-PH treatment system and engineered to soften and condition all the water for every use in your whole home or business. It is designed to treat higher hardness levels without having to add to use two ICS-P systems in series.

Treatment with PolyHalt® salt free softener and water conditioner
  • Produces salt free soft water using ion bond technology to prevent hard water minerals from behaving hard.
  • No need to buy, transport, store or use heavy bags of salt or potassium
  • Prevents harmful and embarrassing stains, hard to remove spots, hard scale buildup and soap scum
  • Protects and reduces problems with plumbing, fixtures and appliances from sediment, mineral and aggressive water damage
  • Prevents silica etching and pitting of glass and fixture damage
  • Makes soft water that doesn't feel slimy or slippery
  • Water is safe for all uses including drinking, cooking, bathing, watering pets plants and gardens
  • Reduces amount of soaps, detergents and work needed to clean 
  • Makes hair look and feel better with less time, shampoo and conditioner
  • Makes clothes last longer and be whiter, brighter and softer longer

Other Specs

Filter Size:


Treatment Included: P, PolyHalt H, High Capacity 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 4 reviews
Corrina Rogers
Water filter

Helps a lot with our hard water.

Thank you Corrina for sharing your experience

Joe Rupp (Richland, US)
Too soon to know.

Not yet installed. Please ask again after 6 months or so.

Richard Swanson
The mineral build-up on fixtures is manageable

The produce works as described. The mineral build-up on fixtures is manageable. Prior to installation, not so much.