International Water Treatment Maritime AS

Address: Bjerkås Næringspark Bygg 23, 3470 SLEMMESTAD
Phone: +47 31287171


International Water Treatment Maritime AS was founded in 1992. Our main activity is non-chemical water treatment of any fresh water system to prevent corrosion. This is achieved by installing ELYSATOR in the different heating, cooling and steam generating systems in the industrial, housing and marine applications.

ELYSATOR is a Swiss product (reg. trademark) with more than 30 years of experience and with thousands of installations in all kinds of systems. (Industry, hospitals, private housing, food processing etc.) The first maritime installations were made in 1994. And now, thousands of Elysators has been successfully installed on vessels worldwide.


The Elysator can be used in any kind of closed or partially closed Systems with circulation (Marine and Industrial) where corrosion might occur.


Marine: Elysators are installed into new buildings & existing vessels for all kind of fresh water systems where corrosion might occur. Cruise ships are an excellent example of the diversity of the Elysator. On these types of vessel they are used for protection of FW cooling systems, boilers, main engine cooling, air-conditioning units, azipod propulsion and also potable hotwater.


Industrial: Elysators are installed in many industrial systems including airports, dairies, food processing, power plants (also nuclear). They are also used in the central heating systems of many large housing and apartment complexes, hotels and hospitals.


Some of our customers


Marine Land-based
- ARAD U.S. Dept. of Transportation Maritime Administration
Washington State Ferries
- British Columbia Ferries
- Inter-Island Ferry, Alaska
- Westward Fishing Company
- Glacier Fish Company
- American Seafood
- The Boat Company 
- American Eagle
- Barber Moss Ship Mgmt
- Dakota Creek Industries
- Arctic Wind
- Mt. Mitchell (Research)
- Crystal Cruise Line
- Holland-America Cruise Line
- Princess Cruise Lines
- Princess Cruises
- Royal Caribbean Cruises
- Carnival Cruises
- Norwegian Cruise Line
- Bergesen DY ASA
- Odfjell ASA
- National Iranian Tankers
- Wallenius Marine
- V-Ship
- Star Cruises
- Wilh.Wilhelmsen
- IMC Singapore
- Tanker Pacific Management
Fred Hutchinson Cancer Research Ctr, Seattle
- Sea-Tac International Airport
- Washington State Capitol
- City of Edmonds
- Darigold
- Seattle Children's Hospital
- St. Peter Hospital,
- Olympia, WA
- St. Mary Medical Center,
- Walla Walla, WA
- Forsmark Nuclear powerplant
- Wartsila powerplants Azores
- Oslo airport Gardermoen
- Hotels, hospitals and schools (all over Scandinavia)
- Svalbard Island
- And Rocketbase
- Telenor AS (Norway largest officebuilding, 26 systems.)
- Officee Buildings (all over Scandinavia)
- Royal Norwegian Defense Ministery (Airports, navy bases, officebuildings etc.....)
- Among 800/900 installations in Scandinavia