The Faircloth Skimmer® floats on the surface of the sediment basin as it fills and drains, releasing the cleanest water. The skimmer drains the basin slowly over several days at a constant rate to maximize settling. The adjustable orifice regulates the filling and drawdown of the basin and improves efficiency. Call us at (919) 732-1244 or visit www.FairclothSkimmer.com for additional information including our updated sizing calculator and other resources.