RDL Group GmbH

What RDL Group GmbH does

RDL Group GmbH, headquartered in Hohenbrunn near Munich, is a privately-held German water treatment company founded in 2009 to consolidate several independent businesses, including three water treatment companies operating in the market for over a decade. The company designs, manufactures, and sells reverse osmosis (Umkehrosmose) water filtration systems under two brands: Sonvita, positioned as a premium line for household and office use, and Osmotech, positioned as a quality leader for aquaristics and professional membrane applications. Its core technology is a multi-layer laser-perforated polymer membrane with a 0.0001 micron pore size, complemented by sediment and activated-carbon filter cartridges (the latter made from coconut-shell-derived carbon) and an emerging line of water refinement cartridges for mineralization, ionization, and alkalization.

The company operates a dual-channel go-to-market model entirely through proprietary e-commerce: Filterzentrale (filterzentrale.com / .ch) for end consumers across the DACH region, and Europefilter for B2B wholesale and dealer customers, with over 500 large commercial accounts. RDL Group sells across Germany, Austria, Switzerland, Italy, Spain, and the United Kingdom, supported by a Swiss-domain storefront and DHL Go Green logistics. Revenue is generated through one-time hardware sales of RO systems (Hobby, Profi, Ultimate PLUS, Puraqua Touch configurations with 50–200 GPD membrane options) and a recurring stream of replacement filters and membranes tied to a stated installed base of approximately 120,000 active units in DACH.

Ownership rests entirely with FORUM Family Office (Forum Private Equity GmbH), a permanent-capital family office following a Berkshire-Hathaway-style long-term hold approach with a 10–15% annual growth target for portfolio companies. The company relocated from Ottobrunn to Hohenbrunn in 2018 to expand warehouse capacity alongside a new generation of RO systems. No revenue, headcount, or AI capabilities are publicly disclosed.

Name

RDL Group GmbH

Legal name

RDL Group GmbH

Website

https://rdl-group.de

Company type

Private

Founded year

2009

Operating status

Operating

Headcount range

1–10 employees

Short description

RDL Group GmbH is a German water treatment company that designs, manufactures, and sells reverse osmosis filtration systems and replacement filters under the Sonvita and Osmotech brands, serving DACH households via Filterzentrale and B2B dealers via Europefilter.

Ownership category

akta.pro rank

Product category

Water Filtration Systems

NAICS

Commercial and Service Industry Machinery Manufacturing (333310)

SIC

Wholesale-Hardware & Plumbing & Heating Equipment & Supplies (5070), Wholesale-Professional & Commercial Equipment & Supplies (5040)

akta.pro primary industry

Reverse Osmosis (RO) Systems (Residential) (CRAJAJAK)

akta.pro secondary industries

Water & Home System Care (Water Softeners, Septic Treatments, Drain/Openers, Appliance Cleaners) (CRADAKAK), Water Heating & Treatment Appliance Retail (Water Heaters, Water Softeners, Filtration Systems) (CRACACAF)

Keywords

• Reverse osmosis systems
• Water filtration systems
• Drinking water treatment
• Membrane filtration technology
• Water purification cartridges

Headquarters

HQ city

Hohenbrunn, Bavaria

HQ country

Germany

HQ region

Europe

Offices2 records

Markets served

GTM type

B2B and B2C

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Water Filtration Hardware Sales: Sale of reverse osmosis water filtration units (Osmoseanlagen) as one-time hardware purchases under Sonvita and Osmotech brands. Units are available in various configurations (Hobby, Profi, Ultimate PLUS, Puraqua Touch) with interchangeable membranes (50, 100, 150, 200 GPD).
2. Replacement Filter and Membrane Sales: Recurring revenue from sale of original replacement filters and membranes for purchased osmoseanlagen. Original replacement filters are made from premium materials, subjected to regular quality controls, and are precisely fitted. Membranes are available in 50/100/150/200 GPD variants.
3. B2B Wholesale / Bulk Commercial Sales: Europefilter online shop serves commercial large customers from specialist trade and further processing industries. Over 500 large commercial customers order larger quantities at lower prices through the dedicated dealer portal.
4. Water Refinement Cartridges: Sale of water refinement cartridges that enrich filtered water with minerals, trace elements, and other desired additives. Popular complementary products that improve taste and add functional properties (mineralization, ionization, alkalization).

Go-to-market motion2 records

Distribution channels4 records

Marketing channels6 records

Core offering

RDL Group GmbH designs, manufactures, and sells reverse osmosis (Umkehrosmose) water filtration systems under two proprietary brands — Sonvita (premium household and office) and Osmotech (aquaristics and membrane technology). The product portfolio includes Osmoseanlagen (RO systems), filter cartridges, replacement membranes, and water refinement cartridges. Products are sold through two owned e-commerce platforms: Filterzentrale (B2C) and Europefilter (B2B wholesale).

Product overview

RDL Group GmbH is a leading European water treatment company offering a comprehensive product portfolio centered on reverse osmosis water filtration systems. The core product line consists of Osmoseanlagen (reverse osmosis systems) available under two main brands: Sonvita (premium household/office segment with elegant design) and Osmotech (professional aquaristics and membrane technology focus). The product ecosystem includes complementary Filterkartuschen (filter cartridges), Membrantechnologie (membrane technology with 0.0001 micron pore size), and Wasserveredelungskartuschen (water refinement cartridges for mineral enrichment). The company operates two e-commerce platforms: Filterzentrale (B2C retail shop for end customers) and Europefilter (B2B platform for retailers and wholesale partners). Notable named products include Puraqua Touch and Ultimate PLUS reverse osmosis systems, with membranes available in 50, 100, 150, and 200 GPD configurations.

Differentiator

Problem solved

Functional benefit

Brands

• Sonvita: Premium brand for household and office water filtration products, characterized by elegant design, quality haptic feel, and innovative technology.
• Osmotech

Products and services

• Osmoseanlagen (Reverse Osmosis Systems) Reverse osmosis systems that filter nearly all foreign substances from tap water through a semipermeable membrane, providing pure water for drinking, aquariums, or scale-free household appliance use. Available in configurations such as Hobby, Profi, Ultimate PLUS, and Puraqua Touch, with membrane options of 50, 100, 150, or 200 GPD. Sold under the Sonvita and Osmotech brands.
• Wasserveredelungskartuschen (Water Refinement Cartridges) Complementary water refinement cartridges that enrich filtered reverse osmosis water with minerals, trace elements, and functional additives. Options include mineralization, ionization, bio-energetization, alkaline water, structured water, and energized water cartridges.

Quantifiable outcome

• Saves approximately 700 kg of plastic waste per household per year (~913 water bottles at ~80g average), with ~120,000 active units saving ~84 tonnes of plastic annually in the DACH region
• +2 more outcomes

Named customers3 records

Segments4 records

Ideal customer profiles3 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Partnerships

Six partnerships are on record, tiered minor.

• YookminorStrategic or Co-development PartnerPartnership for climate protection: Filterzentrale customers can make a climate contribution with every order. Yook supports forest protection and reforestation in Borneo. Trees absorb CO2 from the atmosphere, creating important ecosystems for animals and people.
• DHL Go GreenminorOthersDHL Go Green supports RDL Group in combating climate change by offsetting emissions generated during transport, including CO2 and other greenhouse gases, as well as upstream emissions from energy and fuel production needed for logistics services.
• Cobos Fluid Service GmbHminorStrategic or Co-development PartnerListed as a partner on the RDL Group partner network page. Cobos Fluid Service is also a portfolio company of FORUM Family Office in the water/wastewater sector.
• Leyco WassertechnikminorStrategic or Co-development PartnerListed as a partner on the RDL Group partner network page. Leyco Wassertechnik is also a FORUM Family Office portfolio company in the water/technical sector.
• Triton Wasser GmbHminorStrategic or Co-development PartnerListed as a partner on the RDL Group partner network page. Triton Wasser is also a FORUM Family Office portfolio company in the water sector.
• HSH BerlinminorChannel Partner/ Reseller/ DistributorListed as a partner on the RDL Group partner network page.

Scale indicators5 records

Recent moves10 records

Expansion highlights5 records

Direct peers

• BWT (Best Water Technology): Austrian-headquartered European water treatment specialist offering point-of-use filtration, RO, and water softening for residential and commercial customers. Direct competitor with comparable product breadth across DACH.
• Grünbeck: German water treatment specialist focused on household softening, filtration, and RO systems. Direct DACH competitor with overlapping residential and commercial product lines.
• Judo Wasseraufbereitung: German manufacturer of household water treatment equipment including filters and softening systems. Regional DACH peer serving the same plumbing-installer and household channels as RDL.
• Bluewater: Swedish premium RO system manufacturer focused on residential and light commercial point-of-use filtration. Direct competitor in the European premium RO segment with similar go-to-market emphasis on sustainability.
• Aquaphor: European-headquartered (Estonia) water filtration company producing RO cartridges, under-sink systems, and replacement filters. Direct comparable in cartridge-based filtration consumables and replacement revenue model.

Broad incumbents

• Brita: Germany-headquartered consumer water filtration brand (owned by Clorox) with broad pitcher and under-sink offerings including RO systems. Closest large-scale brand comparable to RDL's Sonvita household line in the DACH market.
• Culligan: Global water treatment provider with strong residential RO and replacement filter business plus B2B services. Comparable in offering RO systems and consumables across consumer and commercial segments, though operationally much larger.
• Pentair: US-listed water solutions company selling residential and commercial filtration, including RO and replacement membranes. Comparable in producing filtration consumables and systems, at a much larger scale.
• A. O. Smith: Global water treatment and water heating manufacturer with residential RO offerings under multiple brands. Comparable in selling household RO systems and consumable replacement filters.

Emerging players

• Coway: Korean home water and air purifier brand with growing European presence and direct-to-consumer subscription model. Comparable in emphasizing consumable replacement revenue and household wellness positioning.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights6 records

Customer concentration

• LinkedInlinkedin.com/company/rdl-group-gmbh

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Subsidiaries2 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 RDL Group GmbH