What Clack Corporation does

Clack Corporation is a family-owned, US-based manufacturer of precision water treatment components, founded in 1944 in Madison, Wisconsin and now headquartered in Windsor, Wisconsin. The company operates five manufacturing facilities (four in Windsor, one in Rogers, Arkansas) and two regional distribution centers (Phoenix, Arizona and Jacksonville, Florida), employing 51-100 people. Its core technology portfolio spans engineered plastic control valves (including the WS1.5PB at 48 gpm service flow), glass-filled composite cartridge tanks (Hydro-Cure), blow-molded brine tanks, meltblown polypropylene sediment filters with a patented take-off system, and a comprehensive line of branded filter media (Birm, GreensandPlus, Filter-Ox, Filter-Ag, Corosex) for iron, manganese, hydrogen sulfide, and suspended solids removal. In 2024, Clack acquired Ozotech, Inc. to add ozone generator technology to the portfolio.

Clack sells exclusively through B2B channels: global OEM partnerships with water treatment system assemblers, regional OEM suppliers, wholesalers, and certified water treatment professionals (plumbers and dealers). The company does not sell directly to end users and does not publicly disclose pricing. Customers are reached via WQA/NGWA-affiliated trade shows, association partnerships, and a technical knowledge center on the company's website. Products carry extensive regulatory certifications including NSF/ANSI 42, NSF/ANSI/CAN 61 and 372, AWWA B100-01, AWWA B604-96, EN12915, and WQA Gold Seal, and are marketed under federally registered trademarks. Revenue is not publicly disclosed and the company remains under family ownership with Richard Clack serving as president and CEO since 1987.

Name

Clack Corporation

Legal name

Clack Corporation

Website

https://clackcorp.com

Company type

Private

Founded year

1944

Operating status

Operating

Headcount range

51–100 employees

Short description

Clack Corporation is a family-owned US manufacturer (founded 1944) of precision water treatment components—control valves, tanks, meltblown filters, filter media, and ozone generators—sold to OEM assemblers, wholesalers, and water treatment professionals via seven US locations.

Ownership category

akta.pro rank

Product category

Water Treatment Components

NAICS

Soap and Cleaning Compound Manufacturing (32561)

SIC

Chemicals & Allied Products (2800), Miscellaneous Chemical Products (2890)

akta.pro primary industry

Water & Wastewater Treatment Plant Equipment (Clarifiers, Aeration, Membrane Systems) (IMAHAEAJ)

akta.pro secondary industry

Water Treatment & Process Specialty Chemicals (IMAEABAN)

Keywords

• Water treatment components
• Filtration media
• Control valves
• Water softening tanks
• Ozone generation systems

Headquarters

HQ city

De Forest

HQ country

United States

HQ region

North America

Offices4 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Operations, Personnel, Technology or R&D, Marketing or Sales, Infrastructure

Revenue model

1. Water Treatment Components: Sale of precision water purification components including control valves, tanks, filtration media, and accessories to OEM assemblers and distributors. Products designed for seamless integration into water treatment systems.
2. Custom/Private Label Filters: Production capabilities allow private-label and specialty filters up to 60 inches in length. Manufacturing services for OEM partners with custom specifications.
3. Ozone Technology (via Ozotech acquisition): Ozone generators for water treatment applications, acquired in 2024 as part of strategic expansion into broader water treatment technology solutions.

Go-to-market motion3 records

Distribution channels4 records

Marketing channels4 records

Core offering

Clack Corporation designs and manufactures water treatment components for OEM customers, including control valves, pressure tanks, brine tanks, cartridge tanks, reverse osmosis systems, meltblown and dual gradient filters, and a broad line of branded filter media. The company also owns the Ozotech brand of ozone generation technology following its 2024 acquisition.

Product overview

Clack Corporation provides precision water purification technology components primarily for OEM partners, offering a comprehensive portfolio of water treatment products including Control Valves (WS series including WS1.5PB), Hydro-Cure branded cartridge tanks and meltblown filters, mineral/specialty/retention tanks, brine tanks and cabinets, RO systems and accessories, and extensive filter media options (Birm, Filter-Ag, Filter-Ag Plus, Greensand Plus, Filter-Ox, Corosex, Calcite, Garnet, Anthracite, activated carbons). In 2024, Clack acquired Ozotech to expand into ozone technology for water treatment applications.

Differentiator

Problem solved

Functional benefit

Brands

• Hydro-Cure®: Cartridge tank brand using injection-molded glass-filled composite material for water filtration applications. A federally registered trademark of Clack Corporation.
• Ozotech

Products and services

• WS1.5PB Control Valve Clack-branded control valve engineered for water softener and filtration systems, used by OEMs and system builders.
• Mineral, Specialty and Retention Tanks Composite pressure tanks for residential and commercial water treatment applications.
• Brine Tanks Salt-storage brine tanks used as part of ion-exchange softening systems.
• Hydro-Cure Cartridge Tanks Cartridge-style filter housings sold under the Hydro-Cure brand.
• Microline Reverse Osmosis Systems Residential and light-commercial RO systems sold under the Microline brand.
• Meltblown Filters Sediment filter cartridges produced using meltblown media, sold under the Hydro-Cure brand.
• Dual Gradient Filters Multi-layer filtration cartridges with two distinct media grades for graded sediment reduction.
• Birm Filter Media Granular filter media for iron and manganese removal.
• Filter-Ag Filter Media Silica-based filtration media used as a turbidity-reduction layer.
• Corosex Filter Media Magnesium-oxide-based media used to neutralize acidic water and raise pH.
• Filter-Ox Filter Media Granular filter media formulated for iron and hydrogen sulfide reduction.
• GreensandPlus Filter Media Silica sand coated with manganese oxide for iron, manganese and hydrogen sulfide removal.
• Garnet Filter Media High-density garnet sand used as a support bed in multi-media filters.
• Calcite Filter Media Calcium-carbonate media used to neutralize low-pH water.
• Anthracite Filter Media Coal-based filter media used as a top layer in multi-media filtration systems.
• Coconut Shell High Activity Carbon Coconut-shell-based granular activated carbon for chlorine and organic contaminant reduction.
• Catalytic High Activity Carbon Catalytically active carbon media for chloramine and hydrogen sulfide reduction.
• Ozotech Ozone Generators Ozone generation systems sold under the Ozotech brand for water and air treatment applications.

Quantifiable outcome

• Service flow rate of 48 gpm and backwash 43 gpm for WS1.5PB control valve
• +2 more outcomes

Segments4 records

Ideal customer profiles1 record

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature7 records

Partnerships

One partnership is on record.

• Ozotech, Inc.coreStrategic or Co-development Partner · 1 January 2024In 2024, Clack acquired Ozotech, Inc., a premier manufacturer of ozone generators. This strategic acquisition reinforces Clack's commitment to providing cutting-edge solutions and strengthens its position as a leader in the water treatment technology market. Ozotech products (TR-200 Tank Recirculation Kit with Ozone) are now featured on Clack's website.

Scale indicators3 records

Recent moves7 records

Expansion highlights5 records

Broad incumbents

• Culligan International: Global water treatment brand with both direct consumer offerings and OEM/channel distribution. Overlaps with Clack on treatment systems and is a downstream customer for many component categories Clack supplies.
• Pentair: Global water treatment major that owns the Fleck and Autotrol control-valve lines directly competing with Clack's WS-series. Also a broad OEM/commercial/industrial water systems provider, so overlap with Clack is deep but Clack operates at a narrower component-supplier scope.
• Xylem: Global water technology company spanning treatment, transport, and testing. Operates in residential/light commercial water treatment and adjacent filtration markets that overlap with Clack's commercial/industrial system components.
• A.O. Smith Corporation: Water treatment and heating-equipment manufacturer with residential and commercial portfolios. Produces filtration systems and components that overlap with Clack's commercial/industrial water treatment applications.
• Watts Water Technologies: Established manufacturer of water treatment and plumbing components, including filtration media, valves, and water quality equipment. Competes with Clack across residential/commercial water treatment components but at a much broader product and geographic scope.
• 3M Purification: Major manufacturer of filtration media and finished filtration products used in residential, commercial, and industrial water treatment. Competes with Clack's meltblown, activated carbon, and specialty media product lines at the OEM and end-customer level.

Emerging players

• Viqua (Trojan Technologies / Danaher): Specialist in UV water disinfection systems for residential and light commercial applications. Adjacent but partial overlap with Clack following the Ozotech acquisition, addressing complementary disinfection use cases at the same OEM customers.
• Hayward Industries: Pool and spa water-treatment equipment manufacturer with proprietary valves, filters, and chemistry. Overlaps with Clack on the residential/light commercial treatment-component side, but focused on pool/spa rather than potable water.

Regional players

• Erie Controls (now part of Watts Water): Historic OEM control-valve competitor cited in Clack's own history (1969 joint venture in Belgium). Same residential/commercial water treatment valve category, now part of Watts. Direct comparability on channel, product, and OEMs.

Direct peers

• Filtrex (Cuno/3M legacy): Manufacturer of meltblown and pleated filtration cartridges for OEM water treatment applications. Closest comparable to Clack's Hydro-Cure meltblown filter line on materials, channel (OEM/private label), and certifications (NSF/ANSI 42).

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xx.com/ClackCorp

Compliance14 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles2 records

Subsidiaries1 record

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Clack Corporation