The AZ stadium has room from more than 17,000 spectators. The drinking water supply for all these people is safely regulated by a Hydro-Unit. It goes without saying that the building has to fulfil the strict safety requirements set by the Netherlands Fire-Fighting Federation and Netherlands Association for Fire-Fighting and Disaster Management Service to guarantee all these people’s safety. The use of the DP-Pumps Fire-Unit means the building operator no longer needs to worry about satisfying all these regulations.