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.

The drainage channel is less than 1 inch wide and comes equipped with a removable, washable mesh filter.

As an alternative to permeable concrete and paving stones, the d-Rain Joint® is cheaper and easier to install and maintain.

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.