Corrugated plastic drain pipe, spiral rib plastic drain pipe, plastic end sections for plastic drain pipe, couplers made primarily of plastic for coupling the adjoining ends of corrugated drain pipes; storm water management devices, namely, non-metal catchment basins and non-metal detention basins in the nature of cisterns; storm water retention structures formed from plastic pipes and endplates that retain and delay dispersal of retained storm water; Fabricated structural steel plate and aluminum plate structures, namely, bridge structures, headwalls, and culvert structures; fabricated sheet metal products, namely, coated and uncoated corrugated steel pipe, coated and uncoated spiral rib steel pipe, coated and uncoated corrugated aluminum pipe, coated and uncoated spiral rib aluminum pipe, end sections for steel pipe; welded-wire mesh gabions consisting primarily of metal for earth retention and erosion; storm water retention structures formed from metal pipes and endplates that retain and delay dispersal of retained storm water; Underground filtration and filter units for filtering rainwater and storm water; hydrodynamic separators for storm water treatment used for filtering water of suspended solids, hydrocarbons, and debris; Flow control unit, consisting primarily of non-metal buoyant flow control devices having a buoyant body and a movable valving member or inlet opening responsive to changes in water level for controlling the release of water from detention ponds or reservoirs
Plumbing fittings, namely, lateral connectors of the type having a gasketed sleeve, hub, and compression clamp in the nature of couplers for use in plastic conduit and metal conduit storm water management systems
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