d-Rain Joint Pavement Rainwater Filtration System Designed for Onsite Rainwater Management - Video
Bio-Microbics introduces the 'd-Rain Joint™', a simple, green alternative stormwater filtered drain for hard surfaces. As an exterior, linear filter drain for impervious surfaces, the d-Rain Joint™ puts filtered rainwater in the underneath gravel detention area of the pavement increasing the usable surface and eliminating costly storm water drainage infrastructure. Urban storm water runoff has become a focus in recent years. In most cities, significant amounts of water fall onto impervious surfaces, such as roads, driveways, parking lots, etc., ending up as run off; sheeting across surfaces and picking up more contaminants and pollutants to simply flow out unfiltered to waterways through the storm drains and greatly reduces the amount of water infiltrating the soil. The d-Rain Joint™ is a simple, low-cost, and robust onsite storm water management alternative compared to other permeable, pervious surface options and can be used wherever a permeable, pervious driveway, parking lot, street or walkway is needed. The d-Rain Joint™ system is a highly effective and unique design that allows the use of traditional concrete, asphalt or paver type materials to construct a high performing permeable, pervious surface system. Easy to install like a standard expansion joint in a driveway or walkway, the ADA-compliant d-Rain Joint™ drainage channel system is less than 1” wide and is virtually undetectable between the joints of a concrete slab. The product is highly durable material and gives storm water a path to a sub-surface drainage bed. This provides an outlet for surface water to be directed to a drainage bed and collected and held or allowed to percolate back into the soil to conform to environmental conservation and protection requirements. The channel-inserted filter captures sediment to ensure continued effectiveness of the system. The d-Rain Joint™ uses rebar (standard steel, uncoated/coated, galvanized, synthetic, or sleeved with heat shrink tubing) through predrilled holes in the product to stabilize and “connect” the d-Rain Joint™ with poured-in-place 4” concrete slab. The d-Rain Joint™ is placed on a 4” bed of pea-sized gravel, which is on a 1’ aggregate gravel bed. The d-Rain Joint™ drainage channels do not extend all the way to the side concrete forms this is so that the channel will become a completely enclosed channel after the concrete has set. The drain, which offers a flow rate of more than 2 gallons per minute per linear foot, installs at the same time as the surface installation. Size: 13/16” w x 4” h Standard Lengths: 8′ Filter media: 10PPI Flow Rate: appox. 2 gallons per minute per linear foot As an eco-friendly, simple and cost-effective stormwater filtration solution, the d-Rain Joint offers the benefits of permeable pavement for less cost. The d-Rain Joint is a new, innovative and cost effective method for creating permeable, pervious surfaces where LID (low impact development) stormwater management is needed.