The unit is made of marine-grade fiberglass and stainless steel to ensure longevity and durability. The Grate Inlet Skimmer Box (GISB) is a specialized inlet filter used specifically for grated catch basins. The position of the curb inlet basket high in the catch basin allows for captured debris to dry between storm events and avoid restriction to upstream pipes. Filtered water leaves the basket and enters the catch basin.The water flows over the weir and into the filtration basket, filtering out trash, sediment and hydrocarbons.The immediate drop in the throat elevation prevents head loss through the inlet This allows sediment to collect along the incoming side of the weir. ![]()
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