The BIOROCK sewage treatment plant is not designed for installation on a flood plain and can never be (as with all of our competitor's systems) submerged in water without damage occurring.
We can guarantee the wearability of the system when installed below ground in a wetland area but never when submerged in flooded land due to the connections, which, by definition, in most cases only assure inside to outside sealing, as well as due to our buffers which are not designed for this type of installation without special fittings.
Talk to your local product product specialist.