• ICS-STP Cascadian Water treatment system for sediment, taste and odor and Salt free ion bond water softener, plumbing and appliance protection, staining, silica etching and pitting of glass, scale control. Image
  • System includes filter housing assembly, cartridge filter, bracket, screws, filter wrench, bottom drain valve kit, silicon O-ring lube and detailed instructions. Image
  • Bottom housing drain valve and fittings included for easier and safer filter changes. Image
1 4

Cascadian Water

ICS-STP

$1,177.00
$1,177.00
Shipping calculated at checkout.
Treatment Included

S, Sediment T, Taste & Odor

Suitable For

Whole House
Connection

1" FNPT
Filter Size

4.5" x 20"
ICS-STP Cascadian Water treatment system for sediment, taste and odor and Salt free ion bond water softener, plumbing and appliance protection, staining, silica etching and pitting of glass, scale control. Image
System includes filter housing assembly, cartridge filter, bracket, screws, filter wrench, bottom drain valve kit, silicon O-ring lube and detailed instructions. Image
Bottom housing drain valve and fittings included for easier and safer filter changes. Image

Customer Reviews

Based on 27 reviews
81%
(22)
4%
(1)
7%
(2)
0%
(0)
7%
(2)
P
Phil Tracy
Very expensive, but seems to work WELL

No pun intended

Thank you Phil. We're happy you're happy. Thanks for sharing.

L
Linda McArthur
Great Water

I live on an island where the water is hard and tastes awful. I was wanting to put in a water softener but my plumber convinced me to use the Cascadian Water system with the ICS-STPK filter. I couldn't be happier. First of all the water tastes great, my fixtures are not sporting hard water stains, and taking a shower or bath is a soft water delight. I am awed by the gunk on the filters when I change them once a year. (Terrifying, actually!). I'm so please with this system, I added it to my rental house for my tenants. All is excellent!

Hi Linda, Thank you for sharing your experience with your Cascadian ICS-STP/STPK with everyone. Love the details and how it has made such an impact in you life.

A
Axel Russell
Dissapointed

New "O" rings should have been included at no cost with these new filters that are priced with a windfall profit at $500 !!!!!!!!!

Hi Axel, as was communicated to you prior to this review there are several reasons we do not include replacement O-rings with every replacement filter kit. These include, extra O-rings are included with every system, the O-rings can last for several years, in the 12 years we’ve been building ICS treatment systems we’ve had two different housings each taking a different O-ring and we have no way of knowing which O-ring any one of our customers may need. So, if we were to include O-rings with every filter replacement kit we would have to include one that would fit and one that did not fit. Supplying O-rings that don’t fit or aren’t needed is not an Eco friendly way to do business and is against our company policy.

To reduce the chance another customer might be expecting to receive O-rings with their replacement filter kit we are working to make it very clear on the website O-rings are not included..

Thank you for the review.

S
Skeets
Water Filter: ICS-STPK

It makes our water so much better! Service is Fantastic!! We ordered our filters and I swear they were here the next day!!

C
Charles Barnes
Not what I expected

I can still smell chlorine in the tap water and the water softener does not eliminate the mineral buildup of rings on the porcelain stools, other than that, I guess it is working plus the filter replacement price is a bit pricey

Hi Charles, you can save money on replacement filters by joining our subscription plan. Please consider this the next time your filters are due for replacement. Thanks for the review.

I
Ingrid Schwalbe
One of the Best Water Filter Systems Out There!

We built our home in 2017 and our plumber recommended your system. Before we had a salt water filtration system that worked well. The first two years on your filters we had crystals that leaked into our water system and we had to remove them from our toilet flushing mechanism with tweezers, which was a hassle. However, each time it happened your company sent a new filter for free. After those two years it hasn't happened but once. Our well water tastes great, we do still get mineral deposits on the shower doors and toilets. The only downside is that the two filters are very expensive.

Hi Ingrid, thank you for your review.

f
fischer

ICS-STPK

Fischer, Thank you for your 5 star review.

S
SLK
cleaning is noticeably easier

Once we installed the ICS-STPK, the mineral buildup in our plumbing has decreased very significantly. While cleaning all sinks, shower, etc is easier, it is the reduction in buildup in the toilet that is most noticeable, about 90% better. This has saved me tons of scrubbing, etc and I'm very happy about this. While the annual filter cost is substantial, I think it is definitely worth it.

Hi SLK, Thank you so much for sharing your experience and thoughts about your ICS-STP and replacement filters.

M
Mark Lytle

I wish there was a scientific way to test whether you need to change your filters. Shaking a bottle of water with a drop of soap In it , is silly. I haven’t tested the water quality at a lab . Any suggestions on where to have the water tested?

Hi Mark, we agree it would be nice to have a easy test. We have found in over 97% of applications changing your filter every 12 months works very well.

K
Ken Frenzel

Way too expensive!

123

Customer Reviews

Based on 27 reviews
81%
(22)
4%
(1)
7%
(2)
0%
(0)
7%
(2)
P
Phil Tracy
Very expensive, but seems to work WELL

No pun intended

Thank you Phil. We're happy you're happy. Thanks for sharing.

L
Linda McArthur
Great Water

I live on an island where the water is hard and tastes awful. I was wanting to put in a water softener but my plumber convinced me to use the Cascadian Water system with the ICS-STPK filter. I couldn't be happier. First of all the water tastes great, my fixtures are not sporting hard water stains, and taking a shower or bath is a soft water delight. I am awed by the gunk on the filters when I change them once a year. (Terrifying, actually!). I'm so please with this system, I added it to my rental house for my tenants. All is excellent!

Hi Linda, Thank you for sharing your experience with your Cascadian ICS-STP/STPK with everyone. Love the details and how it has made such an impact in you life.

A
Axel Russell
Dissapointed

New "O" rings should have been included at no cost with these new filters that are priced with a windfall profit at $500 !!!!!!!!!

Hi Axel, as was communicated to you prior to this review there are several reasons we do not include replacement O-rings with every replacement filter kit. These include, extra O-rings are included with every system, the O-rings can last for several years, in the 12 years we’ve been building ICS treatment systems we’ve had two different housings each taking a different O-ring and we have no way of knowing which O-ring any one of our customers may need. So, if we were to include O-rings with every filter replacement kit we would have to include one that would fit and one that did not fit. Supplying O-rings that don’t fit or aren’t needed is not an Eco friendly way to do business and is against our company policy.

To reduce the chance another customer might be expecting to receive O-rings with their replacement filter kit we are working to make it very clear on the website O-rings are not included..

Thank you for the review.

S
Skeets
Water Filter: ICS-STPK

It makes our water so much better! Service is Fantastic!! We ordered our filters and I swear they were here the next day!!

C
Charles Barnes
Not what I expected

I can still smell chlorine in the tap water and the water softener does not eliminate the mineral buildup of rings on the porcelain stools, other than that, I guess it is working plus the filter replacement price is a bit pricey

Hi Charles, you can save money on replacement filters by joining our subscription plan. Please consider this the next time your filters are due for replacement. Thanks for the review.

I
Ingrid Schwalbe
One of the Best Water Filter Systems Out There!

We built our home in 2017 and our plumber recommended your system. Before we had a salt water filtration system that worked well. The first two years on your filters we had crystals that leaked into our water system and we had to remove them from our toilet flushing mechanism with tweezers, which was a hassle. However, each time it happened your company sent a new filter for free. After those two years it hasn't happened but once. Our well water tastes great, we do still get mineral deposits on the shower doors and toilets. The only downside is that the two filters are very expensive.

Hi Ingrid, thank you for your review.

f
fischer

ICS-STPK

Fischer, Thank you for your 5 star review.

S
SLK
cleaning is noticeably easier

Once we installed the ICS-STPK, the mineral buildup in our plumbing has decreased very significantly. While cleaning all sinks, shower, etc is easier, it is the reduction in buildup in the toilet that is most noticeable, about 90% better. This has saved me tons of scrubbing, etc and I'm very happy about this. While the annual filter cost is substantial, I think it is definitely worth it.

Hi SLK, Thank you so much for sharing your experience and thoughts about your ICS-STP and replacement filters.

M
Mark Lytle

I wish there was a scientific way to test whether you need to change your filters. Shaking a bottle of water with a drop of soap In it , is silly. I haven’t tested the water quality at a lab . Any suggestions on where to have the water tested?

Hi Mark, we agree it would be nice to have a easy test. We have found in over 97% of applications changing your filter every 12 months works very well.

K
Ken Frenzel

Way too expensive!

123

Product Details

The ICS-STP system filters sediment, improves taste and odor and softens water.

Three high performance treatments - one small wall mounted system.
Cartridge based water treatment system is engineered to produce high quality water for every use in home or business. An excellent choice for city or well water.
  • First treatment is a multimicron depth sediment filter to protect and clarify
  • Second treatment is an activated carbon filter
  • Third treatment is PolyHalt® salt free softener and water conditioner

  • 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

Before

After

POE Whole House Softener and Filter - Image

  • ICS-STP

  • S, Sediment

  • T, Taste & Odor

Sediment removal followed by carbon and PolyHalt Treatment for the entire house.

We chose the best gradient sediment filters for ICS. They have high sediment capacity and filtration down to 5 microns.

Filters with T, Taste and Odor capabilities use activated carbon to remove smells and bad tastes from water. It will not remove rotten egg.

Filters with PolyHalt contain our proprietary salt free softening technology.

  • 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.

    Specifications

  • Manual and Instructions

    Find a printable manual for this product or installation instructions

    manual pdf

FAQs

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.

Cascadian ICS-STPK Sediment and Activated Carbon Filters with PolyHalt Salt Free Softener Cartridge Filter Replacement Kit. Image

ICS-STPK

$496.10
$496.10
Shipping calculated at checkout.
View full details
Cascadian ICS-STPK Sediment and Activated Carbon Filters with PolyHalt Salt Free Softener Cartridge Filter Replacement Kit. Image

Customer Reviews

Based on 27 reviews
81%
(22)
4%
(1)
7%
(2)
0%
(0)
7%
(2)
P
Phil Tracy
Very expensive, but seems to work WELL

No pun intended

Thank you Phil. We're happy you're happy. Thanks for sharing.

L
Linda McArthur
Great Water

I live on an island where the water is hard and tastes awful. I was wanting to put in a water softener but my plumber convinced me to use the Cascadian Water system with the ICS-STPK filter. I couldn't be happier. First of all the water tastes great, my fixtures are not sporting hard water stains, and taking a shower or bath is a soft water delight. I am awed by the gunk on the filters when I change them once a year. (Terrifying, actually!). I'm so please with this system, I added it to my rental house for my tenants. All is excellent!

Hi Linda, Thank you for sharing your experience with your Cascadian ICS-STP/STPK with everyone. Love the details and how it has made such an impact in you life.

A
Axel Russell
Dissapointed

New "O" rings should have been included at no cost with these new filters that are priced with a windfall profit at $500 !!!!!!!!!

Hi Axel, as was communicated to you prior to this review there are several reasons we do not include replacement O-rings with every replacement filter kit. These include, extra O-rings are included with every system, the O-rings can last for several years, in the 12 years we’ve been building ICS treatment systems we’ve had two different housings each taking a different O-ring and we have no way of knowing which O-ring any one of our customers may need. So, if we were to include O-rings with every filter replacement kit we would have to include one that would fit and one that did not fit. Supplying O-rings that don’t fit or aren’t needed is not an Eco friendly way to do business and is against our company policy.

To reduce the chance another customer might be expecting to receive O-rings with their replacement filter kit we are working to make it very clear on the website O-rings are not included..

Thank you for the review.

S
Skeets
Water Filter: ICS-STPK

It makes our water so much better! Service is Fantastic!! We ordered our filters and I swear they were here the next day!!

C
Charles Barnes
Not what I expected

I can still smell chlorine in the tap water and the water softener does not eliminate the mineral buildup of rings on the porcelain stools, other than that, I guess it is working plus the filter replacement price is a bit pricey

Hi Charles, you can save money on replacement filters by joining our subscription plan. Please consider this the next time your filters are due for replacement. Thanks for the review.

I
Ingrid Schwalbe
One of the Best Water Filter Systems Out There!

We built our home in 2017 and our plumber recommended your system. Before we had a salt water filtration system that worked well. The first two years on your filters we had crystals that leaked into our water system and we had to remove them from our toilet flushing mechanism with tweezers, which was a hassle. However, each time it happened your company sent a new filter for free. After those two years it hasn't happened but once. Our well water tastes great, we do still get mineral deposits on the shower doors and toilets. The only downside is that the two filters are very expensive.

Hi Ingrid, thank you for your review.

f
fischer

ICS-STPK

Fischer, Thank you for your 5 star review.

S
SLK
cleaning is noticeably easier

Once we installed the ICS-STPK, the mineral buildup in our plumbing has decreased very significantly. While cleaning all sinks, shower, etc is easier, it is the reduction in buildup in the toilet that is most noticeable, about 90% better. This has saved me tons of scrubbing, etc and I'm very happy about this. While the annual filter cost is substantial, I think it is definitely worth it.

Hi SLK, Thank you so much for sharing your experience and thoughts about your ICS-STP and replacement filters.

M
Mark Lytle

I wish there was a scientific way to test whether you need to change your filters. Shaking a bottle of water with a drop of soap In it , is silly. I haven’t tested the water quality at a lab . Any suggestions on where to have the water tested?

Hi Mark, we agree it would be nice to have a easy test. We have found in over 97% of applications changing your filter every 12 months works very well.

K
Ken Frenzel

Way too expensive!

123