
Development and production of brass and composite couplings for water, wastewater and gas supply.
Isiflo GmbH
Raufoss (NO) · Hemer (DE)New on Amplifa
About us
Since 1965, ISIFLO has developed and produced couplings and fittings for water, wastewater and gas supply at the Norwegian industrial park Raufoss. It started with brass couplings; since 2009, the production of composite couplings has complemented the portfolio, beginning with the Flexi Adapter product family, followed by Sprint and Flexi couplings as well as shut-off valves made of composite material. The range also includes universal couplings made of ductile iron, tapping saddles made of plastic, RDS welded sockets made of steel as well as municipal products (SEPP) made of lead-free brass. The value chain extends from the idea through prototyping and testing to series production; 65 employees work at the Raufoss site. Since 2004, ISIFLO AS has belonged to the Dutch Aalberts N.V. The German subsidiary Isiflo GmbH in Hemer serves the German-speaking market and has operated a central warehouse since 2021. The products are sold to the European and international water and gas industry.
- Site
- Hemer
- Processes
- Manufacture of couplings/fittings (product development, prototyping, testing, series production), Manufacture of composite couplings, Product development, Prototyping, Inspection/testing, Production, Central warehouse/logistics
- Materials
- DZR brass, Brass, Composite, Lead-free brass, Ductile iron, Steel, Plastic (tapping saddles), Plastic
- Certificates
- DVGW Gas Transition Coupling, DVGW Isiflo Brass Gas, DVGW Isiflo Brass Water, DVGW Isiflo Sprint Gas incl. Type 701, DVGW Isiflo Sprint Water, DVGW Sprint Ecoline Water, ÖVGW Sprint/Brass/Eco Line, ISO 9001, ISO 14001
- Founded
- 1965
- Employees
- 65
- Industries
- Water supply, Wastewater, Gas supply, Municipal civil engineering, District heating
- 01
Product development
- 02
Prototyping
- 03
Inspection/testing
- 04
Production
- 05
Central warehouse/logistics
- 06
Distribution
Materials and processes
DZR brass
Dezincification-resistant brass for couplings in drinking water and gas supply.
Brass
Base material of the classic ISIFLO brass couplings and threaded fittings.
Lead-free brass
For shut-off valves and meter installation kits of the SEPP municipal series in drinking water applications.
Composite
Material of the Sprint and Flexi couplings as well as Eco-Line gate valves since 2009.
Ductile iron
For RDS couplings and municipal products for water and district heating supply.
Steel
For RDS welded sockets and special steel constructions.
Plastic
For tapping saddles and components of supply engineering.
Sites

Raufoss
NODevelopment, production, headquarters
- Materials
- Brass, composite
Hemer
DEGerman subsidiary, distribution, central warehouse
Products


Inside the production

Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Manufacture of couplings/fittings (product development, prototyping, testing, series production)Assembly | – | – | – | – | DZR brass, Composite |
| Manufacture of composite couplingsPlastics | – | – | – | – | Composite |
Additional services
Quality
The products are approved with DVGW and ÖVGW certificates for water and gas applications. According to the company, there is a quality system in accordance with DIN ISO 9001 as well as an environmental management system in accordance with ISO 14001.
| Evidence | Raufoss |
|---|---|
| ISO 9001 | |
| ISO 14001 |
History
- 1965
Start of coupling production at the Raufoss Industrial Park.
- 1967
Development and production of couplings for water, wastewater and gas supply; leading brand for brass and composite couplings.
- 2004
ISIFLO AS became part of the Dutch Aalberts N.V.
- 2009
Start of production of composite couplings with the Flexi Adapter product family.
- 2021
Integration of the Seppelfricke municipal civil engineering business unit; establishment of a central warehouse at the Hemer site.