b'LT ENGINEERINGCATALOGOPERATIONRainwater harvesting, in its essence, is the collection,introduction of oxygen into the lower layers of the tank conveyance, and storage of rainwater. Systems can be aswhich maintains a fresh supply of water while preventing simple as a rain barrel for garden irrigation at the end of anaerobic conditions from forming.a downspout, or as complex as a domestic potable system or a multiple end-use system at a large corporate campus. If the catchment area is comprised of a variety of different surfaces, with different runoff coefficients, then a weighted Once a maximum level is reached in the tank, theaverage value should be calculated.innovative overflow siphon (RTX-OVRFLW), with its skimmer effect, removes particles lighter than water (e.g. flowerA = Drainage Area (square feet), the area that drains to pollen, oils, etc.) that float slowly to the water surface.the design point of interest Removing this floating layer of surface pollutants through regular overflow from the tank is important in order toA conversion factor of 7.48 gallons of water per one cubic maintain high water quality and allowance of oxygenfoot of area will be necessary to change the final result diffusion at the water surface. The narrow slits in thefrom cubic feet to gallons.overflow siphon prevent rodents from entering the tank.Determining Demand: There are two types of water The Floating Intake with Hose (RTX-FSCF) has an air-filleddemands:ball that suspends the floating inlet filter just belowthe water surface where the cleanest water resides. Indoor demand includes the number of people in the A high quality 1-inch diameter flexible hose allows forbuilding, the number of hours per day the building is connection of the floating inlet to a pump or suction line.occupied, the numbers and types of toilets/urinals in The filter is made out of lead-free brass with a 0.047-inchplace, etc. Design considerations would be the same as stainless steel screen and a built-in check valve. the demand from a fresh water supply line. The additional concern would be the creation of required water pressures The Calmed Inlet feature prevents disturbance and and any pretreatment from the rainwater storage tank.re-suspension of fine sediments that gather on the bottomCall ParkUSA Engineering for design help from pre-of the tank. Another important function of the inlet is theassembled lift stations to pipe, valves and fittings.AREA DESCRIPTION RUNOFFCHARACTERRUNOFF COEFFICIENT C OF SURFACE COEFFICIENT CBUSINESS PAVEMENTDOWNTOWN 0.70-0.95 ASPHALT AND CONCRETE 0.70-0.95NEIGHBORHOOD 0.50-0.70 BRICK 0.70-0.85RESIDENTIAL ROOFS 0.75-0.95SINGLE-FAMILY 0.30-0.50 LAWNS, SANDY SOILMULTI-UNITS, DETACHED 0.40-0.60 FLAST, 2 PERCENT 0.05-0.10MULTI-UNITS, ATTACHED 0.60-0.75 AVERAGE, 2-7 PERCENT 0.10-0.15RESIDENTIAL (SUBURBAN) 0.25-0.40 STEEP, 7 PERCENT 0.15-0.20APARTMENT 0.50-0.70 LAWNS, HEAVY SOILINDUSTRIAL FLAT, 2 PERCENT 0.13-0.17LIGHT 0.50-0.80 AVERAGE, 2-7 PERCENT 0.18-0.22HEAVY 0.60-0.90 STEEP, 7 PERCENT 0.25-0.35PARK, CEMETERIES 0.10-0.25PLAYGROUNDS 0.20-0.35RAILROAD YARD 0.20-0.35UNIMPROVED 0.10-0.30212 INFO@PARKUSA.COM|888-611-7275|WWW.PARKUSA.COM'