DOC Sports Construction and Legacy Links leaders in the synthetic turf building community completed a fantastic Softball installation featuring the AirField airdrain drainage system in Benton Arkansas, and the results speak for themselves. Here is the ASTM D4716 Flow Rate per Unit Width and Hydraulic Transmissivity Testing for actual drainage capacity, at a 1/2% slope. The AirDrain will actually drain 171 inches per hour. The ASTM D4716 was done with 2 metal plates top and bottom and the grid tilted at a 1/2% slope. This is the only way to be able to claim drainage per hour. Don’t letem kid ya! If they don’t have this test ask them why? AirDrain Sports Field Drainage Systems 100% vertical and horizontal drainage capabilities that eliminates the need for a traditional base drainage system, such as herringbone trenching or flat pipe etc. only needing perimeter or exit drains. AirDrain brings 100% vertical drainage across your entire field, using gravity to pull and drain the water.