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BioMicrobics - Model d-Rain Joint -Rainwater Filtration Device
The d-Rain Joint is a filter inserted into concrete expansion joints that allows rainwater and other runoff to filter into the native soil without pooling or contributing to excessive off-flows of stormwater.
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When it rains, the water flows across the surface of the concrete.
Rainwater percolates through the filter in the d-Rain Joint, and penetrates the aggregate under the concrete
The water drains through the aggregate and into the soil. This eliminates runoff and helps to recharge existing groundwater resources.
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Driveways
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Parking lots
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Sidewalks
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Patios

