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Cascadian Water

Sump for 4.5x20 Filters

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Treatment Included

Sump for 4.5x20 Filters
Sump for 4.5x20 Filters

Product Details

Need to replace your sump for your whole house water filter? This will fit any of the second generation ICS series POE filters such as the ICS-SP, ICS-TP, ICS-STP.
  • 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

Small Size Means Flexible Install

Don't sacrifice precious garage space. The whole house filters from Cascadian are much smaller, and take up no floor space.

Learn about install options

Save Space in Your Garage



POE Whole House Softener and Filter - Image

  • 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.

  • Manual and Instructions

    Find a printable manual for this product or installation instructions

    manual pdf


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.

Replacement Filter for this system:

We made finding the correct replacement filter cartridge easy to find, simply add a K to the end of the part number.

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