Some dockside activities and equipment are particularly serious backflow risks because of the types and quantities of possible contaminants or the likelihood of backflow conditions occurring. These include:

  • filling of ships' drinking water tanks
  • refuelling and general water loading points
  • dry docks - especially maintenance work on plumbing systems
  • sewage disposal
  • fish houses and markets
  • pressurised systems and equipment for non-drinking water
  • fire-fighting systems using other than mains water