Whole-House THM, Chlorine, Chloramine & VOC Reduction Filter with Clack WS1 Control Valve
Improve the quality, taste, and odour of your entire household water supply with this high-capacity whole-house backwashing carbon filtration system.
This system combines catalytic carbon, coconut-shell activated carbon, and KDF-55 media to provide broad-spectrum treatment for chlorinated municipal water. It is designed to help reduce chlorine, chloramines, trihalomethanes (THMs), unpleasant tastes, odours, and selected dissolved organic contaminants before the water reaches your faucets, showers, plumbing fixtures, and household appliances.
The automatic Clack WS1 control valve periodically backwashes the media bed, helping remove trapped material, reclassify the carbon, and maintain consistent filtration performance with minimal day-to-day maintenance.
Ideal for Municipal Water: Recommended for homes, cottages, offices, restaurants, and light-commercial properties supplied with chlorinated or chloraminated municipal water.
Multi-Media Filtration Design
This system uses three complementary filtration media to provide broader treatment than a standard single-media carbon filter.
Catalytic Carbon
Catalytic carbon provides both adsorption and enhanced catalytic activity. It is particularly useful for reducing chloramines and other difficult oxidizing contaminants while also providing strong organic-contaminant adsorption.
Coconut-Shell Activated Carbon
High-activated coconut-shell carbon helps reduce free chlorine, unpleasant tastes and odours, and a broad range of dissolved organic contaminants from municipal water supplies.
KDF-55 Process Media
KDF-55 is a high-purity copper-zinc process media that uses oxidation-reduction reactions to help reduce chlorine and support the overall performance of the carbon filtration media.
Key Features
- Designed for whole-house municipal water treatment
- Helps reduce chlorine and chloramine
- Helps reduce THMs and selected volatile organic contaminants
- Helps improve unpleasant water tastes and odours
- Combination of catalytic carbon, coconut carbon, and KDF-55
- Automatic Clack WS1 backwash control valve
- Downflow service configuration
- Durable fiberglass-reinforced mineral tank
- Lead-free brass plumbing connectors
- Available with 3/4-inch or 1-inch plumbing connections
- Bypass valve included
- No salt or harsh chemical regenerant required
- Fully automatic operation after initial programming
- Assembled in Canada
Benefits
- Provides treated water throughout the entire home
- Helps improve drinking-water taste and odour
- Reduces chlorine exposure at faucets, showers, and baths
- Helps reduce chloramine in municipal water
- Helps reduce THMs formed during chlorination
- Large media capacity reduces the need for frequent cartridge changes
- Automatic backwashing maintains the media bed
- No disposable monthly filter cartridges required
- No salt or chemical regeneration required
- Helps protect downstream water-treatment equipment
Available System Sizes
| Media Capacity | Typical Application |
|---|---|
| 1.2 cu. ft. | Smaller homes and lower water-demand applications |
| 1.6 cu. ft. | Typical residential applications |
| 2.2 cu. ft. | Larger households and higher water-demand applications |
Choosing the Correct Size: Select the system size according to household water consumption, peak flow demand, chlorine or chloramine concentration, and desired media service life.
All sizes require approximately 3–4 business days of handling time before shipment.
Media Configuration
| Media / Component | Quantity or Configuration |
|---|---|
| Catalytic Carbon | Approximately 50% of the carbon media volume |
| Coconut-Shell Activated Carbon | Approximately 50% of the carbon media volume |
| KDF-55 | 10 lb. |
| Washed Gravel Underbed | Approximately 0.2 cu. ft. |
Why Use a Gravel Underbed? The washed gravel supports the filtration media, improves water distribution through the tank, and helps the media bed expand properly during automatic backwashing.
System Specifications
| Specification | Details |
|---|---|
| Control Valve | Clack WS1 automatic backwash control valve |
| Service Flow | Downflow |
| Available Media Capacities | 1.2, 1.6 and 2.2 cu. ft. |
| Filtration Media | Catalytic carbon + coconut-shell activated carbon + KDF-55 |
| KDF-55 Quantity | 10 lb. |
| Gravel Underbed | Approximately 0.2 cu. ft. |
| Plumbing Connections | 3/4-inch or 1-inch lead-free brass connectors |
| Bypass Valve | Included |
| Distributor Pilot | 1 inch |
| Approximate Media Life | Approximately 7–9 years* |
| Maximum Operating Temperature | 100°F |
| Approximate System Height | 56 inches |
| Approximate Weight | 70 lb., depending on selected configuration |
| Assembly | Canada |
*Media life is an estimate only. Actual life depends on water chemistry, chlorine/chloramine concentration, THM and organic loading, water usage, backwash frequency, and system sizing.
How the Automatic Backwash System Works
During normal operation, water flows downward through the media bed. Chlorine and dissolved organic contaminants are adsorbed by the carbon, while catalytic carbon and KDF-55 provide additional treatment for chlorine and chloramine.
At the programmed interval, the Clack WS1 valve automatically reverses water flow through the tank. The backwash cycle expands and cleans the media bed, removes accumulated suspended material, and redistributes the media before returning the system to normal service.
The Clack WS1TC platform supports programmable regeneration intervals and dedicated backwash-only programs for filtration applications.
Recommended Applications
- Whole-house municipal water filtration
- Chlorine reduction
- Chloramine reduction
- THM reduction
- Selected VOC and dissolved-organic reduction
- Taste and odour improvement
- Residential homes and cottages
- Restaurants and food-service applications
- Light-commercial buildings
- Pretreatment before reverse osmosis or other purification equipment
What's Included
- Clack WS1 automatic backwash control valve
- Fiberglass-reinforced mineral tank
- Selected system media capacity
- Catalytic carbon media
- Coconut-shell activated carbon media
- 10 lb. KDF-55 process media
- Approximately 0.2 cu. ft. washed gravel underbed
- Bypass valve
- Selected 3/4-inch or 1-inch lead-free brass plumbing connectors
- Internal distributor tube and filtration components
- Standard assembly hardware
Product Documentation
- Learn About THMs in Your Water
- Clack WS1 Backwash Control Valve Specification Sheet
- Clack WS1 Programming and Operation Manual
- Pentair Structural Poly Glass Tank Specification Sheet
- Catalytic Carbon Specification Sheet
- Coconut-Shell High Activated Carbon Specification Sheet
- KDF-55 Process Media Specification Sheet
Frequently Asked Questions
Does this system reduce chlorine?
Yes. Both the coconut-shell activated carbon and KDF-55 media are designed for chlorine reduction. The system is intended for point-of-entry treatment of chlorinated municipal water.
Does this system reduce chloramine?
Yes. The catalytic carbon media is specifically suited to applications requiring chloramine reduction. Proper sizing and sufficient contact time are important for effective chloramine treatment.
Does this system reduce THMs?
Activated carbon is commonly used for reduction of trihalomethanes and other dissolved organic compounds. Actual THM reduction depends on influent concentration, water chemistry, flow rate, contact time, and the condition of the carbon media.
Does the system require salt or chemicals?
No. This is an automatic backwashing filtration system and does not require salt or a chemical regenerant. The media bed is cleaned periodically using water during the automatic backwash cycle.
How long does the filtration media last?
Estimated media life is approximately 7–9 years under suitable operating conditions. Actual life depends heavily on chlorine and chloramine concentration, water usage, organic loading, backwash frequency, and system size.
What is the difference between regular carbon and catalytic carbon?
Standard activated carbon provides strong adsorption of chlorine, tastes, odours, and many dissolved organic contaminants. Catalytic carbon is specially processed to provide enhanced catalytic activity, making it better suited for difficult applications such as chloramine reduction.
Why is KDF-55 included?
KDF-55 provides an additional chlorine-reduction mechanism through oxidation-reduction reactions and complements the activated-carbon media in whole-house municipal-water applications.
Important: This system is designed primarily for treated municipal water. If your source water contains significant iron, manganese, hydrogen sulfide, hardness, sediment, bacteria, or other contaminants, additional pretreatment may be required.
Whole-House System Shipping
Freight Shipping May Be Required: Due to the size and weight of larger whole-house systems, some configurations cannot ship by regular parcel courier and must be shipped on a pallet by LTL freight.
Max Water will cover up to $199 of the standard pallet shipping charge. Additional residential-delivery, liftgate/tailgate, remote-area, appointment, or special-handling fees may apply depending on the destination and freight carrier.
If additional shipping charges are required, our team will contact you after the order is placed and before the shipment is released.
Before Ordering: For the best performance, system sizing should be based on your household water demand and a recent water analysis. Higher chlorine, chloramine, THM, or organic loading may require a larger media capacity or shorter service interval.
