Several terms can cover the same installation here…
is collecting your roof water and saving it; using this resource to drink or irrigate your property instead of sending it down the drain. This for the green environmental enthusiast installed in their domestic property. Rainwater harvesting has been traditional in the rural environment and is now becoming popular for domestic residential use. This ranges from the smaller hobby size using a 300 litre tank and one single down-pipe for garden use (very economical to set up giving great benefits) to more sustainable standalone 5000 litre or more systems for building use, requiring filtration and backflow protection to meet council regulations. These need to be sized correctly to formulae to ensure smooth running all year around. This enables complete independence from council supply.
Post Disaster Rated Systems
is a similar installation for domestic supply to ensure uninterrupted water supply in case of council outage or disaster, required to ensure continued occupancy for a property or home. . They become more viable for whole home usage when the storage is 25000 litres or more, especially with our uncertain whether climate. In case of drought some of our clients elected to fit 2 x 25000 litre storage tanks and did not run out of water during the drought. These tanks take only two to three days of rain to have them full again. Often documented a clean sanitary water supply is critical for life. These will also require back-flow protection and the appropriate level of filtration for each level of usage from home consumption down to ensuring a farm supply and continued operation for a set number of days. The intended duration and number of occupants in a property will be required to calculate the appropriate level of water storage on the property.
For commercial applications when council supply will not give a high enough flow rate. We install large diameter pipework from the tanks to several large water pumps to get large volumes of water to get the task at hand completed. Multi-level commercial buildings and commercial laundromats have a need for this type of system. For commercial needs the tanks are usually installed inside a building away from public tampering. They would sit inside overflow trays in case of possible leak.
These tanks are calculated for size due to the draw off required to ensure continued commercial operation.
Water filtration is not generally required for these tanks as they are filled by council water only. Registered air gap with council or backflow protection is also required for these systems.
We are able to fit these filtration systems and there are many options available. The appropriate filtration is definitely required by council to ensure safe drinking water unless the tanks are using council supply only. This is usually a minimum of twin cartridge filters of a maximum one micron rating with a UV light to kill any possible giardia. This really is the minimum for water storage and there are additional options to remove ions from water and improve taste.