Sharp Sand-2NS frenchdrain U-Grip™ Base units or universal

U-Grip™ Base units or universal base pads are recommended under all Unilock walls for improved accuracy and makes for a speedier installation

or a 50/50 sand/salt mix

25″ w x 19″ h ABS Head

Black corrugated pipe is most commonly used for gravity flow water management

Alternative Permeable Base – Min

Sharp Sand-2NS frenchdrain U-Grip™ Base units or universalSold By The Yard ( 1 Yard Covers approx 100 Sq Ft approx 2" 3" Depth) Sharp sand, also known as 2NS, grit sand or river sand and as builders' sand when medium or coarse grain, is a gritty sand used in concrete and potting soil mixes or to loosen clay soil as well as for building projects. Can Also be used as a top base for Pavers Wall.