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CAR __ / CHECK VALVE <br /> HOOD GASKET 4 <br /> \\ FLOAT <br /> .. FILTER MEDIA__._ r3 � <br /> i IP �N <br /> CENTER TUBE e%� � 4%10' <br /> '' 3 OUTER SCREEN <br /> la''`1q444* <br /> I Y � b,Zr <br /> ' OPTIONAL SECONDARY <br /> FILTER MEDIA <br /> ,'��RpYYY7 9.'tXs'. $41 <br /> ) <br /> FLOAT SEAT _ `iY@p.� <br /> tt4i f P f ff <br /> tYyy yW ot <br /> y USat!. INNER MESH <br /> SCRUBBING REGULATORS— �'+Yg� .t I �r I ,�,fgz s�ba�l <br /> Y41,3411 .,gam_,, � �"%v"1" <br /> UNDER DRAIN MANIFOLD \ " <br /> -DA MANIFOLD ` `._. VAULT FLOOR <br /> CAST UNDER INTO <br /> R VAULT IN FLOOR <br /> FILTERED WATER <br /> 1 <br /> Figure 1. The StormFilter Cartridge <br /> IPriming System Function <br /> When stormwater in the StormFilter unit enters a StormFilter cartridge, it percolates horizontally <br /> I through the cartridge's filter media and collects in the center tube of the cartridge, where the float in <br /> the cartridge is in a closed (downward) position. <br /> I <br /> Water continues to pass through the filter media and into the cartridge's center tube. The air in the <br /> cartridge is displaced by the water and purged from beneath the filter hood through the one-way <br /> check valve located in the cap. Once the center tube is filled with water (approximately 18 inches <br /> deep), there is enough buoyant force on the float to open the float valve and allow the treated water in <br /> Ithe center tube to flow into the under-drain manifold. This causes the check valve to close, initiating a <br /> siphon that draws polluted water throughout the full surface area and volume of the filter. Thus, the <br /> entire filter cartridge is used to filter water throughout the duration of the storm, regardless of the <br /> iwater.surface elevation in, the unit. This siphon continues until the water surface elevation drops to <br /> the elevation of the hood's scrubbing regulators.III - <br /> The cartridges are connected to the under-drain manifold with a plastic connector. Since some media <br /> used is potentially buoyant, a threaded connector affixed to the under-drain manifold (with glue orr <br /> other adhesive) is necessary to ensure that the cartridge isn't lifted out of place. For the heavier <br /> Icompost media, a slip connector is used. <br /> The StormFilter is also equipped with flow spreaders I that trap floating debris and surface films, even <br /> during overflow conditions. Depending on individual site characteristics, some systems are equipped <br /> with high and/or base flow bypasses. High flow bypasses are installed when the calculated peak <br /> storm event generates a flow that overcomes the overflow capacity of the system. This is especially <br /> I <br /> T 800.548.4667 F 800.561 .1271 W www.stormwaterinc.com 2 <br />