By NORMA Group
The conveyance performance of each bead should be similar; the Transmissivity (flow through the system) will be similar, which will be one or two orders of magnitude greater than the native soils. EZ-Drain is available in smaller diameter bundles and the aggregate is smaller due to manufacturing considerations. “EZflow” will be used throughout this document to describe both products.
EZflow drainage systems are designed for use in residential and light commercial non-traffic applications. EZflow drainage systems are designed to withstand single pass construction wheel loading and occasional light vehicular load of up to 16,000 lbs per axle provided the product is installed in a trench with 12" of compacted fill placed over the bundles. EZflow drainage systems are not designed to be placed under live-load traffic conditions such as paved or non-paved roadways, driveways, or parking areas.
EZflow must be covered with a minimum of 6 inches of soil. The maximum depth to bury EZflow is 8 feet of soil. Please contact NDS Technical Services for depths exceeding 8 feet.
The bundles are fabricated with corrugated polyethylene internal piping. Pipe sizes are available in 3 in., 4 in. or 6 in. diameters. EZflow couplers or other commercially available fittings allow for easy connections to pipes of varying makes and sizes.
A minimum of 2 in. of sand or pea gravel should be placed above the drainage bundle to provide a suitable base for the concrete. The basement drain lines should daylight to a sump or some other form of discharge.
Note: this is only for non-load bearing applications.
The polystyrene aggregate will tolerate extreme temperature ranges, and has a continuous use temperature range of -108°F to +175°F. It does not become brittle at subzero temperatures and does not need to be buried any deeper for an installation in any other temperature range.
The AOS is a 30 U.S. Sieve (0.60 mm) for the geoxtextile mesh for the 7, 8, 10 and 15 inch products. All EZflow products are manufactured using a 30 U.S. Sieve geotextile mesh.
The pipe is the limiting factor in the product’s ability to contour. Any aggregate only bundle is capable of making very sharp bends such as 90 degree corners. The pipe bundles will require internal connection fittings to make bends of greater than 45 degrees.
Note the following individual weights (per stick/section of EZflow or EZ-Drain):
Similar to mineral aggregate, expanded polystyrene offers no nutritional value and is therefore left undisturbed by ground burrowing rodents and other pests.