Well points are small well screens of sizes 50 to 80 mm in diameter and 0.3 to 1m length. Well points are either with braces or stainless steel screens and are made with either closed ends or self jetting types.

spacing of the well points depends on the permeability of the soil and on the availability of the time to affect the drawdown. In fine to coarse sands a spacing of 0.75 to 1m is satisfactory. A spacing of 1.5 m may be necessary in silty sands of fairly low permeability. In highly permeable coarse gravels they may be as close as 0.3m.