What Harmsco does

Harmsco Inc. is a privately held U.S. water filtration products manufacturer founded in 1958 and headquartered in Riviera Beach, Florida. The company designs, manufactures, and distributes filter housings and replacement cartridges across five vertical markets: municipal drinking water, commercial and industrial process water, residential water treatment, pool and spa, and marine (including cruise ship potable water). Core technology centers on proprietary pleated cartridge geometries, an UP-FLOW design architecture for filter housings, Hurricane industrial housings, electropolished stainless steel finishes, and a COAT fusion-bonded epoxy coating for salt-water marine duty. Products are certified to NSF/ANSI 61 (drinking water), NSF/ANSI 50 (pool/spa), NSF/ANSI 42 (taste/odor), FDA-listed for food contact, and available in USP Class VI materials for pharmaceutical applications, with explicit positioning around Safe Drinking Water Act and LT2 Rule compliance for municipal buyers.

The business model is a one-time-sale industrial consumables business: Harmsco sells hardware (housings) and recurring replacement cartridges, supplemented by licensing/royalty revenue from OEM partnerships embedding Harmsco filtration into third-party systems. Go-to-market is sales-led, executed through a direct sales and technical support organization (including a Director of Sales & Marketing and dedicated export sales), an authorized U.S. distributor network, and an OEM channel. Pricing is not publicly disclosed; commercial terms include a $50 minimum order, 30-day net domestic credit (with prior approval), and prepayment in USD for international orders. A secondary distribution facility in West Palm Beach, FL handles F.O.B. shipments. Marketing is driven by industry association memberships (15+ U.S. state rural water associations, AWWA, AWWA-ACE 2026, The Water Expo 2026) and trade media partnerships.

Harmsco is a small industrial firm (51-100 employees) operating a 745-SKU catalog with no public revenue, funding, or M&A activity disclosed. The owner-operator profile and 67-year continuous history position it as a legacy, specification-driven mid-market component supplier rather than a venture-backed growth company. The company is investing selectively in new product lines (PFAS carbon cartridges, marine COAT line, HS-30 residential system) and geographic association reach (Western Canada Water) to extend its addressable market.

Name

Harmsco

Legal name

Harmsco Inc.

Website

https://harmsco.com

Company type

Private

Founded year

1958

Operating status

Operating

Headcount range

51–100 employees

Short description

Harmsco Inc. is a U.S. water filtration manufacturer (founded 1958) producing NSF-certified filter housings and cartridges for municipal, commercial/industrial, residential, pool/spa, and marine markets, sold via direct sales, an authorized U.S. distributor network, and OEM partnerships.

Ownership category

akta.pro rank

Product category

Water Filtration Equipment

NAICS

Plumbing and Heating Equipment and Supplies (Hydronics) Merchant Wholesalers (42372)

SIC

Wholesale-Hardware & Plumbing & Heating Equipment & Supplies (5070)

akta.pro primary industry

Replacement Filter Cartridges & Consumables (CRAJAJAH)

akta.pro secondary industry

Filtration (Rapid/Slow Sand, Media, Membrane Pretreatment) (EUANABAB)

Keywords

• Water filtration systems
• Filter cartridges
• Filter housings
• Industrial water treatment
• Municipal water filtration

Headquarters

HQ city

Riviera

HQ country

United States

HQ region

North America

Offices2 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Industrial Filtration Products: Sale of commercial and industrial filter housings and cartridges for water treatment applications across municipal, commercial, and industrial sectors
2. Residential Filtration Products: Sale of residential water filtration systems and cartridges for home water treatment
3. Marine Filtration Products: Specialized filtration solutions for marine applications including cruise ships and recreational vessels
4. OEM Opportunities: Original equipment manufacturer partnerships for embedded filtration solutions

Go-to-market motion1 record

Distribution channels3 records

Marketing channels3 records

Core offering

Harmsco manufactures and sells water filtration products, principally filter housings and replacement filter cartridges, for commercial, industrial, municipal, residential, pool/spa, and marine applications. The portfolio spans proprietary Up-Flow filter housings, Hurricane housings, pleated polyester and microglass cartridges, the HS-30 Secure Water Filtration System, and specialty media such as PFAS-activated carbon cartridges, with NSF/ANSI certifications on key product lines.

Product overview

Harmsco is a U.S.-engineered filtration solutions provider established in 1958, offering a comprehensive portfolio of water filtration products. The product lineup centers on two main categories: filtration housings (including Commercial & Industrial Housings, Municipal Housings, Pool & Spa Housings, Residential Housing, Marine Filtration, Hurricane Filter Housings, and Up-Flow Filter Housings) and filter cartridges (including Commercial & Industrial Cartridges, Municipal Cartridges, Pool & Spa Cartridges, and Residential Cartridges). Key product series include the 701 Premium Polyester cartridge series, the HS-30 Harmsco Secure Water Filtration System, and the Harmsco-Free 701 series featuring bypass-prevention design. The company also provides specialty cartridges for PFAS removal, high-temperature applications, and food-grade applications. Products serve commercial, industrial, municipal, residential, pool/spa, and marine markets with certifications including NSF/ANSI 61 for drinking water, NSF/ANSI 50 for pool/spa, and FDA listing.

Differentiator

Problem solved

Functional benefit

Products and services

• Commercial & Industrial Housings Industrial-grade filtration housings designed for commercial and industrial water filtration applications including chemical processing, food & beverage, pharmaceutical, and petrochemical industries.
• Municipal Housings Filtration housings engineered for municipal drinking water treatment applications, compliant with Safe Drinking Water Act and LT2 Rule requirements.
• Pool & Spa Housings Filtration housings designed for residential and commercial pool and spa water treatment applications.
• Residential Housing Water filtration housings for residential water treatment, conditioning, and well water applications.
• Marine Filtration Specialized water filtration solutions for marine applications including cruise ship potable drinking water, cleaning and cooking water filtration, and recreational/pool water, with COAT coating for salt water applications.
• Commercial & Industrial Cartridges Industrial-grade filter cartridges including Premium Polyester (701 series), Premium Polyester Plus (801 series), Activated Carbon, Hurricane filters, and specialty media for commercial and industrial applications.
• Municipal Cartridges (Pleated Microglass) High-performance pleated microglass filter cartridges designed for municipal drinking water treatment, compliant with LT2 Rule requirements.
• Pool & Spa Cartridges Filter cartridges specifically designed for pool and spa water filtration applications, including Harmsco Pool (HSP) and Supertuf Pool (ST) series.
• HS-30 Harmsco Secure Water Filtration System Single-cartridge water filtration system with 150 PSI pressure rating, 1 inch FPT I/O, 30-3/4 inch cartridge length, 76 inch service height, 1.2 sq ft footprint, constructed of 304 stainless steel with electropolished finish. Compatible with HSC-30 cartridges.
• 701 Series Premium Polyester Filter Cartridge Industrial-grade pleated polyester filter cartridges available in 0.35 to 100+ micron ratings, lengths from 9-3/4 to 40 inches. Features high surface-area pleated design with lower initial pressure drop and longer service life. NSF 61 and FDA certified.
• Hurricane Filter Housings High-performance filter housings designed for demanding applications, featuring 7-3/4 inch outer diameter compatibility and various configurations including single and multi-cartridge options.
• Up-Flow Filter Housings (HIF Series) Cluster cartridge filter housings featuring up-flow design for improved filtration efficiency. Available in various sizes (HIF 21, HIF 24, HIF 42, HIF 75, HIF 150FL) with optional COAT fusion bonded epoxy coating for corrosion resistance.
• PFAS Carbon Cartridges Specialty activated carbon filter cartridges designed for PFAS (per- and polyfluoroalkyl substances) removal from water.

Segments5 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

17 partnerships are on record, tiered moderate, core and minor.

• National Rural Water AssociationmoderateOthersActive membership and participation in National Rural Water Association programs and initiatives
• American Water Works AssociationmoderateOthersMembership and participation in American Water Works Association (AWWA) industry activities and standards development
• Florida Rural Water AssociationcoreOthersActive regional partner in Florida Rural Water Association serving Florida market
• California Rural Water AssociationmoderateOthersRegional industry association partnership in California
• Colorado Rural Water AssociationmoderateOthersRegional industry association partnership in Colorado
• Georgia Rural Water AssociationmoderateOthersRegional industry association partnership in Georgia
• Minnesota Rural Water AssociationmoderateOthersRegional industry association partnership in Minnesota
• Mississippi Rural Water AssociationmoderateOthersRegional industry association partnership in Mississippi
• Missouri Rural Water AssociationmoderateOthersRegional industry association partnership in Missouri
• New York Rural Water AssociationmoderateOthersRegional industry association partnership in New York
• Rural Water Association of UtahmoderateOthersRegional industry association partnership in Utah
• Virginia Rural Water AssociationmoderateOthersRegional industry association partnership in Virginia
• West Virginia Rural Water AssociationmoderateOthersRegional industry association partnership in West Virginia
• Western Canada WatermoderateOthersInternational industry association partnership serving Western Canada
• International Filtration NewsminorOthersMedia partner for industry news and communications
• Environmental and Science Engineering MagazineminorOthersIndustry publication partner for technical content distribution
• FPSAminorOthersFlorida Petrochemical and Supply Association membership

Scale indicators2 records

Recent moves6 records

Expansion highlights5 records

Broad incumbents

• Xylem: Xylem is a global water technology company providing filtration, treatment, and pumping solutions to municipal and industrial customers. Comparable to Harmsco's municipal drinking water filtration business at much broader scale.
• Donaldson Company: Donaldson manufactures industrial filtration cartridges and housings for process water, food/beverage, and chemical applications. Comparable to Harmsco's industrial cartridge portfolio serving similar B2B process filtration buyers.
• Watts Water Technologies: Watts produces plumbing, water treatment, and filtration products including cartridges and housings for residential and light commercial use. Comparable to Harmsco across residential and municipal lines as an established plumbing/water incumbent.
• Culligan Water: Culligan is a major water treatment brand offering residential and commercial filtration systems and replacement cartridges. Comparable to Harmsco's residential and commercial product families with established brand presence.
• Pentair: Pentair is a global water treatment leader with extensive residential, commercial, and industrial filtration portfolios including cartridge systems. Directly comparable to Harmsco across multiple product lines, though much larger and broader.
• Pall Corporation (Danaher): Pall is a major industrial filtration manufacturer producing cartridges and housings for chemical, pharmaceutical, and food/beverage process water. Strongly comparable to Harmsco's commercial/industrial cartridge and municipal segments but at greater scale.
• 3M Purification: 3M's Purification division manufactures industrial and commercial filter cartridges and housings with global distribution. Overlaps directly with Harmsco's 701 series and industrial filtration offerings, serving similar municipal and process water customers.
• Eaton Filtration: Eaton produces industrial filtration cartridges, bag filters, and housings for process water and chemical applications. Comparable to Harmsco's industrial and commercial filtration housings with overlap in target customer verticals.

Direct peers

• Shelco Filters: Shelco manufactures industrial filter housings and cartridges for water and process fluid applications with a similar size and product focus to Harmsco. Direct competitive overlap in commercial/industrial stainless steel filtration housings.
• Hayward Industries: Hayward manufactures pool and spa filtration equipment including cartridge filter systems for residential and commercial pools. Directly comparable to Harmsco's pool/spa housings and cartridges product lines.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/harmsco-filtration-products

Compliance5 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles4 records

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 Harmsco