Overview Building Features Grade JK-6 Grade 7-12

Rain Water Collection

Real Time Data
a Cistern Tank Water Level Liters L
b Grey Water Instant Flow Rate GPM GPM

Rain Water Totalized Consumption Litres

c Domestic Cold Water Flow Rate GPM GPM

Domestic Cold Water Consumption Litres


Main Building Consumption Litres


Rainwater Cistern AccessRainwater harvesting is an age old technology with various arrangements that can range from very basic to very complex. Depending on climate and local conditions, rainwater can be a readily available source of high quality water. A rainwater harvesting system generally consists of the five basic components: the catchment area, a means of conveyance from the catchment area, storage, treatment, and a means of conveyance to the end user; not all systems contain each of these system components. Benefits to a building owner from utilising this resource include a reduction in the building's potable water demand and a reduction in associated water utility costs.

How it is used in the school:

Rainwater Cistern in the GroundRainwater is collected from the entire roof area of the building (2,790 m2) with roof drains and piped to the two (2) precast concrete water cisterns (storage tanks). Roof drains are provided with a mesh screen to prevent large debris such as leaves from entering the storage and distribution system. The cisterns have a total storage capacity of 20 m3 (20,000 liters) and are buried underground on the South East side of the building. The cisterns have an incoming water feed connection from the roof drainage system, an outlet pipe to a manhole located in the first floor mechanical room 148, and an overflow connection to the site storm drainage system. A non-potable (water not to be used for drinking or cooking) piping system is utilised to supply all water closets (toilets), urinals, and exterior wall hydrants. Submersible water pumps in the interior manhole are used to pump the harvested rainwater into the non-potable water piping system. This water is passed through a series of filters to remove particulate.  It is then passed through the ultra-violet (UV) filter to kill any microorganisms that may be present prior to entering the building piping distribution system. During periods of low water storage, a connection to the domestic water supply is provided to ensure continuous operation of the building non-potable water supplied plumbing fixtures. 

Download Non-Potable Water Piping Schematic.

Greater Essex County District School Board