Rain Water Systems
The purpose of rain water harvesting is to catch the water and store it for future use before it has a chance to run off into lake, stream, river or soak into ground A typical system would collect the rainwater from the roof or pavement using course mesh to prevent large debris from entering the system. It is important, however, to check existing catchments to prevent contact with hazardous materials such as lead paint, asbestos roof, etc. The initial first few minutes of rain can be diverted known as a first flush diverter to remove airborne pollutants that are present in the sky and on the roof or pavement. However, this might not be needed if rainwater is harvested strictly for irrigation. The purpose of a first flush is to remove debris and reduce sediment build-up in system. After the first flush, rainwater is filtered of suspended debris and sediments. There are different types of filters available such as sand, bag, cartridge, automatic, charcoal, etc. The rainwater is then stored in underground or above-ground storage tanks depending on space limitations at the project site. Adequate provisions to prevent contamination from humans, animals, and other contaminates is very important. The tank should have a tight cover to prevent algae and mosquito growth inside the tank. Various materials of tank construction are available such as concrete, steel, fiberglass, plastic, etc. The tank must be structurally sound so one can store enough water to sustain demand until the next time it rains. Keep in mind that an alternate source of potable water may be necessary to supplement rainwater during drought conditions. Backflow protection is necessary and a pumping system is needed to provide adequate pressure an irrigation system. Any tank overflow is drained to storm sewer or other means available. |
Harvested Water Uses
(CHECK LOCAL CODES PRIOR TO INSTALLATION)
Rain Water Reuse for Toilets and Urinals
Rain Water Reuse for Irrigation |
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