The 2 Stage DOT Filter is designed for greater sediment retention while still providing for stormwater overflow. The base of the filters is made of durable pouches for placement of rock or stone weight. Stage 1 of this filter impounds approximately 16 inches of water and is made of gray, nonwoven fabric providing >96% efficiency of sediment filtration. Stage 2 is made of high visibility, high flow green mesh providing >1100gpm/ft2 stormwater overflow.The High Flow Filter is designed to prevent flooding in areas of high water flow. The base of the filters is made of durable pouches for placement of rock or stone weight. The rock bags impound approximately 8 inches of stormwater. The remainder of this filter is made of high visibility high flow green mesh that allows significant water to flow through while still preventing trash and floatables from entering the pipe system.The 2 STAGE DOT Specialty Filter is designed to meet the requirements of Maryland and Virginia DOT. The base of the filters is made of durable pouches for placement or rock or stone weight. Stage 1 of this filter impounds approximately 16 inches of water and is made of black nonwoven fabric providing >96% efficiency of sediment filtration. Stage 2 is made of high visibility, high flow green mesh providing>1100gpm/ft2 stormwater overflow.

2 Stage FilterThe 2 Stage Filter is designed for sediment retention while still providing for stormwater overflow. The base 25% or Stage 1 of this filter is made of gray, nonwoven fabric providing >96% efficiency of sediment filtration.  The top 75% or Stage 2 of the filter is made of high visibility, high flow green mesh providing >1100gpm/ft2 stormwater overflow.2 Stage 50/50 FilterThe 2 Stage 50/50 Filter is designed for greater sediment retention while still providing for stormwater overflow. The base 50% or Stage 1 of this filter is made of gray, nonwoven fabric providing >96% efficiency of sediment filtration.  The top 50% or Stage 2 of the filter is made of high visibility, high flow green mesh providing >1100gpm/ft2 stormwater overflow.High Flow FilterThe High Flow Filter is designed to prevent flooding in areas of high water flow. The filter is made of high visibility high flow green mesh that allows significant water to flow through while still preventing trash and floatables from entering the pipe system.2 Stage Specialty FilterThe 2 STAGE Specialty Filter is designed to meet the requirements of Virginia and Maryland DOT. The base 25% or Stage 1 of this filter is made of black nonwoven fabric providing >96% efficiency of sediment filtration.  The top 75% or Stage 2 of the filter is made of high visibility, high flow green mesh providing >1100gpm/ft2 stormwater overflow.