Diamond H2o

What Diamond H2o does

Diamond H2O is a privately held, family-owned water treatment company headquartered in Greenville, Wisconsin, designing and manufacturing residential and commercial water conditioning, filtration, and reverse osmosis (RO) systems since 1932 (originally as Oshkosh Filter and Softener Company). Its product portfolio spans the DROP smart water management ecosystem (Hub, leak detectors, salt sensors, pump controllers, and home protection valves with app connectivity), the LINQ, Freedom, Patriot, and ClearFlo lines of water softeners and RO systems (with commercial capacities up to 100,000 gpd), specialty filters (Liberator, Refiner, DCF3, FE Series), and Rustmaster iron/tannin removal systems. The company holds patents on the Liberator Iron Removal Filter and proprietary DHER-2 commercial-grade resin, with products validated to NSF/ANSI 42, 44, and 60 standards through its wholly-owned TG Analytical Laboratories (Wisconsin DNR and DATCP certified). Diamond H2O operates under a hybrid revenue model combining hardware sales (equipment and salt products), professional services (licensed-plumber installations, 19-point and 9-point inspections, salt delivery), and certified lab testing services. Go-to-market is sales-led via direct phone (920-757-5440), website contact forms, field service technicians, and an actively recruited dealer network. The company primarily serves residential homeowners and select commercial customers (including car wash facilities) in the Fox Valley/Wisconsin region, and has maintained continuous family ownership under Thomas Griesbach since 1999.

Key differentiators cited by the company include 85+ years of brand heritage, in-house certified laboratory testing, local U.S. manufacturing, and a full-stack service organization. Technology is built on ion exchange, reverse osmosis membrane separation, and microprocessor-controlled regeneration cycles rather than proprietary AI/ML — the smart-home DROP layer represents IoT connectivity (app notifications, leak detection, salt-level alerts) rather than algorithmic intelligence. Revenue, funding history, and headcount growth trends are not publicly disclosed, limiting the ability to triangulate financial scale.

Name

Diamond H2o

Legal name

Diamond H2O

Website

https://diamondh2o.com

Company type

Private

Founded year

1932

Operating status

Operating

Headcount range

11–50 employees

Short description

Diamond H2O is a family-owned water treatment company in Greenville, Wisconsin, designing and manufacturing residential and commercial water softeners, filters, reverse osmosis systems, and DROP smart water management products. Founded 1932, serving Fox Valley homeowners and businesses via direct sales, dealer network, and certified in-house lab testing.

Ownership category

akta.pro rank

Product category

Water Treatment Equipment

NAICS

Analytical Laboratory Instrument Manufacturing (334516)

SIC

Services-Testing Laboratories (8734), Industrial Instruments For Measurement, Display, And Control (3823), Wholesale-Hardware & Plumbing & Heating Equipment & Supplies (5070)

akta.pro primary industry

Water Softener, Filtration & Treatment System Installation (HSAOAAAH)

akta.pro secondary industries

Laboratory Testing & Analytical Services (in-house/contract labs; microbiology, metals, organics) (EUANAJAB), Monitoring & Control (Dosing Systems, Remote Monitoring, Sensors) (BPABAJAK)

Keywords

• Water softening systems
• Water filtration equipment
• Reverse osmosis systems
• Smart water management
• Water testing laboratory

Headquarters

HQ city

Greenville

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B and B2C

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Water Treatment Equipment Sales: Sale of water softeners, reverse osmosis systems, water filters, and specialty systems for residential and commercial applications. Products are designed and manufactured locally in Greenville, Wisconsin.
2. Installation Services: Professional installation of water treatment systems performed by licensed plumbers and trained technicians. Includes free in-home equipment evaluation and estimates.
3. Inspection and Maintenance Services: 19-point water inspection service and 9-point drinking water system inspection. Regular preventative maintenance to ensure systems run at highest efficiency.
4. Salt Products and Delivery: Sale and delivery of water softener salt products including Solar Crystal, Evaporated Pellet, and Rust Inhibitor Pellet varieties.
5. Water Testing/Lab Services: Water quality testing through TG Analytical Laboratories including bacteria, nitrate, nitrite, fluoride, arsenic, lead, copper testing and more.

Pricing tiers

Go-to-market motion1 record

Distribution channels3 records

Marketing channels5 records

Core offering

Diamond H2O designs, manufactures, and services residential and commercial water treatment equipment including water softeners, water filters, reverse osmosis systems, and DROP smart water management products. The company also operates TG Analytical Laboratories, an in-house DATCP- and DNR-certified water testing laboratory serving Wisconsin plumbers, well drillers, and homeowners. Products are sold direct, through a dealer network, and installed/maintained by licensed plumbers and technicians, primarily serving the Appleton/Fox Valley region of Wisconsin.

Product overview

Diamond H2O is a water treatment company offering a comprehensive portfolio of residential and commercial water conditioning and filtration products. The product lineup centers around four main categories: smart DROP Systems (including Hub, leak detectors, salt sensors, pump controllers, home protection valves, cartridge filters, water softeners, and aeration filters with companion app), LINQ water treatment equipment (water softeners, twin tank systems, and aeration filters), traditional water softeners (Freedom Series, Patriot Series in twin and single configurations, and DROP Pro), and water filters (Diamond Dual, Liberator Series in AC/IR/AN/OR variants, Refiner AC/AN, DCF3 Series, FE Series). The commercial offering mirrors residential products at larger capacities including ClearFlo RO systems (Free Standing, Hinged Wall-Mount, Element Series), commercial water softeners, commercial filters, specialty systems (Rustmaster, Tannin Removal, Dealkalizers), and booster pumps/additional equipment (DVFP, Reject Capture Systems, BPS). All products are third-party validated by TG Analytical Laboratories to NSF/ANSI standards. The company also provides in-house lab testing services, 19-point and 9-point inspection services, and salt delivery programs.

Differentiator

Problem solved

Functional benefit

Brands

• TG Analytical Laboratories: A division of Diamond H2O providing certified water quality testing services for Wisconsin plumbers, well drillers, pump installers, real estate agents, and homeowners. Certified by DATCP and DNR to test for coliform bacteria, nitrate, nitrite, fluoride, arsenic, lead, and copper.
• ClearFlo
• Freedom Series
• Patriot Series
• DROP Systems
• LINQ Systems
• Liberator Series
• Refiner Series
• Rustmaster
• Freedom TR

Products and services

• DROP Smart Water Management Systems A connected home water management ecosystem including the DROP Hub, leak detectors, salt sensors, pump controllers, automatic shutoff home protection valves, whole house cartridge filters, smart water softeners, and aeration filters — all monitored and controlled via the DROP app with 9V battery backup and 5-year warranties. Targeted at residential homeowners wanting leak detection and remote water management.
• LINQ Water Treatment Systems Residential water softeners (single and twin-tank configurations), aeration filters, and side-mount aeration filters that oxidize iron, reduce manganese and sulfur odors, lower inorganics, and feature self-cleaning backwash cycles. Targeted at residential customers seeking whole-home scale and iron protection.
• Freedom Series Water Softener Dual-tank residential/commercial water softener featuring microprocessor controls, 6-cycle controller, coin-cell lithium battery backup, co-current down flow regeneration, and dual-walled polyethylene/fiberglass resin tanks with DHER-2 commercial-grade resin. Targeted at residential homeowners and light commercial users wanting high-capacity softening.
• Patriot Series Water Softener (Single and Twin) Programmable single-tank and twin-tank water softeners with automatic or manual regeneration options, front-mounted touch keypads, large displays alternating between time and gallons remaining, and calendar override for time-based regeneration. Targeted at residential homeowners.
• DROP Pro Water Softener Professional-grade smart water softener for larger living spaces with easy-to-service two-piece construction that integrates with the DROP Hub smart water monitor and DROP app. Targeted at residential customers with larger homes or higher water usage.
• Diamond Dual Filter System Dual-stage filter system (HAC Carbon and Carbon Block) that filters out chlorine, lead, cadmium, mercury, Giardia, and Cryptosporidium; third-party certified to NSF/ANSI 44 standards. Targeted at residential customers needing broad contaminant reduction at point of entry.
• Refiner Series Filters (AC and AN) Residential point-of-entry granular activated carbon filter (Refiner AC) certified to remove chlorine with automatic or manual backwash, and a single-tank acid neutralizer (Refiner AN) with custom media blend to raise pH of acidic water; AN is certified for ferric iron removal. Targeted at residential customers with chlorine, taste/odor, or acidic water issues.
• DCF3 Series Filters Versatile filter system with various media options including activated carbon (taste/odor removal), Birm (iron removal), Calcite (pH neutralization), Filter Ag (turbidity removal), and Manganese Greensand. Targeted at residential customers with diverse water quality issues addressed by a single platform.
• FE Series Iron Filter Iron filter designed for minimal upkeep that removes sulfur and rust, eliminates sediment, extends fixture lifespan, and provides chemical-free water purification. Targeted at residential customers with iron, sulfur, or sediment issues.
• ClearFlo Element Series Reverse Osmosis (Residential) Residential reverse osmosis system with digital TDS display, high-flow low-energy membranes, NSF 61 certified fiberglass membrane housings, low inlet pressure safety shut-off, and programmable automatic restart; capacities from 50 to 4,800 gpd. Targeted at homeowners seeking point-of-use high-purity drinking water.
• Microline Reverse Osmosis System (Residential) Compact residential RO system offering improved taste, high contaminant reduction, no electricity consumption, easy maintenance, and low production cost producing high quality water. Targeted at residential customers seeking simple point-of-use filtration.
• ClearFlo Commercial Reverse Osmosis Systems Commercial-grade reverse osmosis systems in Free Standing (50–100,000 gpd), Hinged Wall-Mount (space-saving), and Element Series configurations, featuring durable frames, high efficiency production, lower reject rates, programmable controls, TDS monitoring, integrated alarms, and continuous performance feedback. Targeted at commercial and industrial buyers needing high-volume purified water.
• Liberator Series Commercial Filters (AC, IR, AN, OR) Commercial water filter series including Liberator AC (high-capacity coconut carbon for chlorine/odor/taste), patented Liberator IR (air-addition iron removal with no chemicals), Liberator AN (calcite acid neutralizer certified for ferric iron removal), and Liberator OR (automated self-cleaning filter reducing chlorine and improving taste). Targeted at commercial and industrial buyers.
• Rustmaster Specialty Systems Commercial water treatment system using highly durable resin resistant to iron fouling, available in Freedom, Reliant, and Patriot configurations for ferrous iron removal. Targeted at commercial buyers with severe iron fouling issues.
• Freedom TR Tannin Removal System High-quality tannin and iron removal system providing 24 hours of soft water, tannin, and ferrous iron-free water for commercial applications. Targeted at commercial buyers needing simultaneous tannin and iron reduction.
• Diamond Dealkalizers Commercial de-alkalizer system that reduces acid treatment needs and lessens corrosion risk in equipment and plumbing. Targeted at industrial buyers needing alkalinity reduction.
• DIS Series Commercial Water Softeners Industrial-grade water softener series for commercial applications. Targeted at high-capacity commercial and industrial softening buyers.
• DVFP Variable Frequency Drive Booster Pump Booster pump available in 1HP, 3HP, and 5HP models at 230V/460V in 1 or 3 phase configurations, accommodating various size, space, reliability, and pressure requirements. Targeted at commercial systems needing consistent inlet pressure.
• RCS Reject Capture Systems System that captures reject/concentrate water from RO systems and delivers it at a desired volume for water recovery applications. Targeted at commercial buyers seeking to improve RO efficiency and reduce waste.
• BPS Booster Pump System Booster pump system for maintaining consistent water pressure in commercial applications. Targeted at commercial sites needing pressure stabilization.
• TG Analytical Laboratories Water Testing In-house certified water testing laboratory division offering SDWA certified water tests including coliform/E-coli bacteria, nitrate, nitrite, fluoride, arsenic, lead, copper, and comprehensive well safety and quality packages; certified by Wisconsin DATCP and DNR. Targeted at Wisconsin plumbers, well drillers, pump installers, real estate professionals, and homeowners.
• Water Inspection Services (19-Point and 9-Point) Comprehensive water inspection services including a 19-point inspection (bypass, meter, injector, screen, pistons/seals/valves, timer, capacity, backwash, brine fill, resin tank condition, etc.) and a 9-point drinking water system inspection (feed TDS, tank air volume, filter/membrane dates, air gap, valves, sanitization, drain restrictor, O-rings). Targeted at residential and commercial customers wanting preventative maintenance.
• Salt Delivery and Brine Service Recurring salt delivery service where technicians add salt (Solar Crystal, Evaporated Pellet, Rust Inhibitor Pellet) to brine tanks, test softened water, and adjust softener controls during each delivery stop. Targeted at residential and commercial water softener owners wanting hands-off salt replenishment.
• Professional Installation Services Professional installation of residential and commercial water treatment systems performed by in-house licensed plumbers and trained technicians, including free in-home equipment evaluation and estimates. Targeted at customers purchasing Diamond H2O equipment.

Quantifiable outcome

• Reverse osmosis systems remove up to 99% of dissolved solids, chemicals, and contaminants

Named customers1 record

Segments1 record

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Partnerships

One partnership is on record.

• TG Analytical LaboratoriescoreStrategic or Co-development PartnerTG Analytical Laboratories is a division of Diamond H2O providing in-house water quality testing services. Certified by Wisconsin DATCP and DNR for testing coliform bacteria, nitrate, nitrite, fluoride, arsenic, lead, and copper. Supports product development and validation with performance testing.

Scale indicators3 records

Recent moves6 records

Expansion highlights5 records

Direct peers

• Kinetico: Manufacturer of non-electric, twin-tank water softeners and filtration systems for residential and commercial applications. Closely comparable to Diamond H2O's twin-tank Freedom/LINQ product lines and similar in targeting both homeowners and commercial customers.
• EcoWater Systems: Water treatment company offering water softeners, reverse osmosis, and filtration systems through an extensive dealer network. Direct competitor with comparable product portfolio and dealer-distribution model.
• Pelican Water Systems: Manufacturer and direct-to-consumer seller of whole-house water filtration, softening, and reverse osmosis systems. Comparable in offering residential-focused water conditioning equipment with proprietary media and tank technologies.
• Culligan: One of the largest residential and commercial water treatment companies in North America, offering water softeners, filtration, and reverse osmosis systems. Direct competitor to Diamond H2O across product categories and customer segments, though with vastly larger national scale and franchise dealer network.
• Rainsoft: Water treatment company offering water softeners, drinking water systems, and whole-house filtration through a dealer network. Directly comparable in residential water conditioning focus and dealer-distributed business model.
• Hague Quality Water: Manufacturer of water softeners, reverse osmosis systems, and filtration products for residential and light commercial markets. Comparable product mix and dealer-based distribution strategy.

Emerging players

• Springwell Water Filtration Systems: Direct-to-consumer water filtration company offering whole-house filters, reverse osmosis systems, and water softeners online. Emerging digital-first player that competes for the same residential customers as Diamond H2O but with a pure e-commerce distribution model.

Broad incumbents

• Pentair: Global water treatment company offering residential and commercial water filtration, softening, and reverse osmosis systems. Operates as a broad incumbent with extensive R&D, brand recognition, and distribution scale beyond Diamond H2O's regional focus.
• Watts Water Technologies: Large publicly-traded manufacturer of water quality and conservation products including plumbing, filtration, and water treatment components. Operates as a broad incumbent across the water industry with overlapping capabilities but much wider portfolio.
• A. O. Smith: Large manufacturer of water heating and treatment products including residential water filtration and softening. Broad incumbent in the water category with significant brand presence in North America and overlaps with Diamond H2O's water quality focus.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• YouTubeyoutube.com/user/DiamondH2O
• Facebookfacebook.com/DiamondH2O

Compliance9 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles7 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 Diamond H2o