Specialist in naval sanitation since 1991

Cleaning : Fresh water tanks


To preserve the fresh water’s quality on board and ensure the users’ safety, it is important to carry out a regular maintenance of the fresh water tanks.

Fresh water tank cleaning

Fresh water tank cleaning

To do so, the fresh water tanks must be emptied, cleaned and disinfected..

The cleaning allows to get rid of sediment and concretions building up on the linings (brown layer), just like residues at the bottom of the tank.
The sediment can have biological causes: algae, fungi, bacteria etc. or chemical: aluminium oxide, also called alumina (white salt), iron oxides, manganese dioxide, carbonates etc.

A regular cleaning allows to check the condition of the tank’s structure (corrosion).

The cleaning of tanks on ships requires a high level of training and skills.
That’s why our technicians are properly trained and apply a cleaning procedure as well as strict safety protocols.

Our cleaning procedure depends on the type of tank.
In some cases, we carry out a mechanical cleaning (hand brushing of the lining) with a scouring disinfectant, then rinsing, or a high pressure cleaning (rotary nozzle).
We then proceed to the disinfection of the tank by spraying and rinsing.

We use high-tech equipment, in compliance with the regulation, gas detector (gas free test), ATEX gear (explosive environment), breathing devices, dry suits, 24V lamps, etc.

The waste from cleaning is collected and transported to an authorised water treatment plant.
A waste tracking slip (BSD / WTS) is issued so as to ensure its traceability.

marpol logo

International Convention for the Prevention of Pollution from Ships (MARPOL)

Adoption: 1973 (Convention), 1978 (1978 Protocol), 1997 (Protocol - Annex VI); Entry into force: 2 October 1983 (Annexes I and II).

The International Convention for the Prevention of Pollution from Ships (MARPOL) is the main international convention covering prevention of pollution of the marine environment by ships from operational or accidental causes.

The Convention includes regulations aimed at preventing and minimizing pollution from ships - both accidental pollution and that from routine operations - and currently includes six technical Annexes. Special Areas with strict controls on operational discharges are included in most Annexes.