Sulfur Water Filter System | Whole House

Item Number: ICS-H


Whole House Water Filter System For:

  • Hydrogen Sulfide (rotten egg/sulfur) Odor Reduction

Includes First Cartridge Filter Kit (a $407 value)

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See Filter Replacement Kit

Reduces water issues:

  • Sulfur Smell in Water

Recommended Uses:

  • Cabin/Vacation Home
  • RV
  • Whole House
Or order by phone: 509-674-4000

Product Description

The Cascadian Sulfur Water Filter System (ICS-H) removes hydrogen sulfide (H2S, rotten egg) odor from your water. You will enjoy your water more than ever after the ICS-H reduces and often completely eliminates foul smelling H2S odors

Single ICS-H system maximum flow rate is 8 GPM. Additional systems may be used in series higher flows or complete treatment.

Smaller size, lower cost and simpler to maintain compared to traditional treatment systems.

Does not require oxidation (chlorine) and chlorine removal.

No salt or power required.

Produces no wastewater.

Includes drain on filter housing for clean no spill easy filter changes.

Additional information

Weight 19 lbs
Dimensions 25 × 8 × 8 in

ICS-H Cascadian Hydrogen Sulfide (Rotten Egg) Filter System

Dimensions: 29″ x 7.5″ x 8″ (Height x Width x Depth)
Connection Diameter:
System Drain: 1/2″
Max. Capacity: 97,500 gallons or 12 months
Best Flow: 3-6 gpm
Max. Flow: 
8 gpm
Min. Pressure: 25 psi
Max. Pressure: 120 psi
Min. Temperature: 39° F
Max. Temperature: 113° F
Number of Filters: 1
Weight: 19 pounds dry
Includes Filter Housing Drain
Other: Recommend following with ICS-ST or ICS-STP

Download and Print Specifications


  1. Included bottom drain makes changing filters simple, easy and quick
  2. System includes an inline flow limiter designed to limit flow to 8 gallons per minute.
  3. For the best treatment we recommend following the ICS-H with the ICS-ST or ICS-STP for filtration and taste & odor.


Click / Press Here to View Installation Instructions

Raw Water Parameters / Conditions for Operation

Bacteria: None Allowed
Chlorine: NA
Colloidal Iron: NA
Hardness: NA
Hydrocarbons, oils, or lubricants: None Allowed
Hydrogen Sulfide: Not for extreme levels
Iron & Manganese (Clear Only): <0.3 ppm
Iron & Manganese (Colored): <0.3 ppm
Iron Bacteria: None Allowed (use ICS-IB to remove)
Organic Iron: None Allowed
 Between 6.5 and 8.5
Sediment: NA
Silica: NA
Tannin / Organics: None Allowed
Turbidity: Less than 1 NTU

Notes for all ICS systems:

  • If Raw Water Parameter Condition for Operation = “NA” the systems will not affect and is not affected by concentrations of that parameter typically found in drinking water
  • If Raw Water Parameter Condition for Operation = “None Allowed” Remove through adequate pre-treatment
  • If Raw Water Parameter Condition for Operation = “Not for extreme levels” The cartridge useful life may be shortened and require more frequent replacement.
  • Extreme levels of any parameter may shorten useful cartridge life
  • Stated “Max Capacity” may be reduced by overall raw water chemistry

Complete Treatment with the ICS-H Hydrogen Sulfide Filter is a simple single step process.

Cascadian ICS-H Hydrogen Sulfide (rotten egg) systems are designed to reduce and even eliminate the foul rotten egg odor. They are very effective in all but the most extreme hydrogen sulfide situations. Too much Hydrogen sulfide and the filter will not work. The more H2S in the water the fewer gallons that can be treated before the filter needs to be changed.

Our ICS-H hydrogen sulfide reduction cartridges use a proprietary media with high purity copper-zinc that reduces contaminants in water by way of oxidation/reduction (redox) reactions.The redox process converts hydrogen sulfide to insoluble sulfide. It does not remove the sulfide from the water and this is why we recommend filtration after the ICS-H. We recommend the ICS-H be followed with sediment and taste & odor filters. The taste & odor filter we recommend is the ICS-ST or ICS-STP which is designed to remove particles and improve taste and odor further enhancing hydrogen sulfide treatment.

For assistance with your treatment system please contact us and we will be happy to help. Maximum service life is 97,500 gallons or 1 year and may be less depending on your water quality and the volume of water treated.

How to change your filter cartridge


How to find your system model number


“We installed our first ICS H2S filter. We put it behind a Nitro System that was randomly allowing H2s by. It works flawlessly. Thanks for the new ICS systems. We bought all 4 for our inventory.”

~ Toby Cyr – Specialty Pump and Well Services, Snohomish, WA.

O3 Water Systems, Inc.
“Limited” CASCADIAN® Integrated Cartridge Solutions

Water Treatment System Warranty

During the time periods and subject to the conditions hereinafter set forth, O3 WATER SYSTEMS, will repair or replace to the original user or consumer, any portion of your new ICS (Integrated Cartridge Solutions) system which proves defective due to defective materials or workmanship of O3WS. Warranty period is 10 years from date of installation. At all times O3WS shall have and possess the sole right and option to determine whether to repair or replace defective equipment, parts, or components. Damage due to conditions beyond the control of O3WS is NOT COVERED BY THIS WARRANTY.

LABOR, ETC., COSTS: O3WS shall IN NO EVENT be liable for cost of removal, installation, transportation, or any other charges which may arise in connection with a Limited Warranty claim.

THIS WARRANTY WILL NOT APPLY: (a) To defects or malfunctions resulting from failure to properly install, operate or maintain the unit in accordance with good trade practices of professionals; (b) to products which are not installed in accordance with applicable local codes and ordinances (c) to products modified at any place other than the point of original manufacture (d) to products moved from the original installation location; (e) to normal maintenance services and parts used in connection with such service; (f) to failures resulting from the abuse, physical damage, fire, freezing, acts of god, accident or negligence; (g) to products used for purposes other than for what they were designed and manufactured, and (h) cartridge filters and replacement kits.

RETURN OF REPLACED COMPONENTS: To obtain specific performance under this Limited Warranty, the defective product must be returned freight prepaid to O3WS in Cle Elum Washington or other such place as O3WS may designate together with proof of purchase, installation date, failure date, and supporting technical data.

PRODUCT IMPROVEMENTS: O3WS reserves the right to change or improve its products or any portions thereof without being obliged to provide such change or improvement of units sold and/or shipped prior to such change or improvement.

WARRANTY EXCLUSIONS: As to any specific O3WS product, after the expiration of the time period of the warranty applicable thereto as set forth under the heading “Warranty Periods” above. Cosmetic damage that does not affect the process functionality of the equipment is not covered. O3WS Industries makes every effort to ensure that all illustrations and specifications are correct. However, these do not imply a warranty that the product is merchantable or fit for a particular purpose, or that the product may not vary from the illustrations and specifications. THERE ARE NO EXPRESS OR IMPLIED WARRANTIES, INCLUDING MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, WHICH EXTENDS BEYOND THOSE WARRANTIES DESCRIBED OR REFERRED TO ABOVE.


Some jurisdictions do not allow the exclusion or limitation of incidental or consequential damages and some jurisdictions do not allow limitations on how long implied warranties may last. Therefore, the above limitations or exclusions may not apply to you. This Limited Warranty gives you specific legal rights and you may also have other rights which vary from jurisdiction to jurisdiction.

For your warranty protection (Magnason-Moss Warranty Act) the WARRANTY REGISTRATION CARD MUST BE COMPLETED AND RETURNED TO O3WS WITHIN TEN (10) DAYS OF INSTALLATION. In the absence or other suitable proof of installation date, the effective date of this warranty will be based upon the date of manufacture plus thirty (30) days. Direct all notices, etc. To: Service Department, O3 Water Systems, Inc., 5301 Airport Rd, Cle Elum WA, 98922

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