Description Our FREE Below Ground, Potable, 1500 USG Design This below ground potable rainwater harvesting system is designed as a primary source of water for potable purposes, such as drinking, cooking, bathing, toilets, and laundry, with a backup water source from hauled bulk potable water if the rainwater tank is empty. The system will provide water for water uses Tier: R4 – Potable Domestic. Roof The below system will be harvesting rain from one building. The roof is provided by others and should be suitable for intended use. Gutter, Downpipes, and Conveyance Piping The gutters, downpipes, and conveyance piping are sized based on specifications from the designs. They are provided by others and should be suitable for intended use. Pre-Filter The below ground potable system will require one (1) pre-filter. These pre-filters operate as both a first flush diverter and prefilter, with a filter mesh size of 320 microns. The full cross-section (pipe diameter) of the rainwater drainage system remains continuously open, and there are no reductions in the cross-section of this appliance in which dirt or water can collect. Rainwater Tank / Cistern This system will provide a total of 1500 USG of rainwater storage with a total of one below-ground tank(s), made of polyethylene. Each tank is 1500 USG. The rainwater tank is designed to provide safe storage of rainwater, which improves water quality because of its design and function. The calming inlet prevents agitation of settled fine dust, the skimming overflow removes floating particles, and the floating filter ensures water is drawn into the pump from approximately 150 mm (6.0″) below the surface of the water. Water Pumping and Treatment System Cleanflo determined the water demand to be 8 GPM @ 60 PSI. This will be pumped by a multi-stage booster pump powered by VFD. The treatment will be three stages to ensure water is safe to use. Stage one is a sediment filter of 25. Stage two is a 10 carbon filter. Stage three is a 5 micron sediment filter. Stage four is an ultrafilter membrane. Water Quality and Treatment Cleanflo designed this system to produce water that is safe for CSA B805 R4 uses, namely potable domestic.
