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.
The septic distribution box is part of the conventional drain field system. It distributes the effluent (wastewater) evenly to the drain field (leach field). The most common way to make this work is through the use of gravity.he equal distribution of the wastewater will maximize the life of the drain field and the entire septic system. An alternate distribution method uses pipes instead of a box to send wastewater into the drain field. In using this method, watertight pipes lead to the trenches in the drainfield.