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Cascadian Water


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Filter Size

2.5" x 10"

P-151121 O-Ring for small Cascadian 1st Generation POU systems. Image


O-Ring for small 1st Generation POU systems

P-151121 Replacement filter housing O-Ring for Cascadian Point of Use ICS Water Treatment Systems including:

  • ICS-P0527
  • ICS-SCP523
  • SC214

This oring is for older style housings which have a black top and house 2.5" diameter filters.


Determining Your ICS's Generation

This will point to a page that explains the differences between gen 1 and gen 2

  • 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

Rely on our expertise to deliver the simplest water treatment

– Cascadian Water has served the needs of our community for nearly 30 years