Available in black or yellow (4" & 6"), 4-slot staggered heavy-duty corrugated pipe is suited for lighter soils that are not sandy.  There are 4 rows of slots in every other valley measuring 1/16" or 3/32" widths. It provides 6.2 square inches of water inlet area, along with a industry leading strength-per-foot ratio. Black and Yellow Poly-Drain® exceed requirements of ASTM F 405, SCS 606, and AASHTO 252 by almost 50%.