transitive. 1  To reverse the winding or twisting of: unwind a ball of yarn. 2  To separate the tangled parts of; disentangle. 3  To free (someone) of nervous tension or pent-up energy.
A leach field is an important part of a septic system. It disperses fluid from the septic system over a large area of soil adjacent to the building it services.he distribution box has another pipe that leads to the leach field. From this pipe, you will dig the trenches. Decide where to dig your trenches. You will need to dig three trenches, each about 12 inches wide and 20 feet long.
It is also referred to as a Tile Bed, a Leaching Bed or Leach Field. A Conventional Bed is made up of two basic components. A Septic Tank, for solids and scum, and a Tile Bed for effluent to drain into. The Ontario Building Code (OBC) calls a Septic Tank a Treatment Unit and the drain field as a Leaching Bed.oo many solids in the drain field will dramatically accelerate the wear of the trenches in the septic bed. The trenches for piping are dug about 30cm to 90cm deep, 50cm to 100cm wide and no closer than 1.6m apart.