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.
A conventional septic system is composed of the septic tank and the drain field. The drain field is where the last stage of wastewater treatment system takes place. It is the area of effluent purification and distribution. An essential part of the drain field is the distribution box.If you think about it, its name gives it away. It is a structure that connects the effluent pipeline from your septic tank to the lateral line, seepage pit, or galley networks. The distribution box or d-box regulates the dispersion of the treated effluent.t is the area of effluent purification and distribution. An essential part of the drain field is the distribution box. If you think about it, its name gives it away. It is a structure that connects the effluent pipeline from your septic tank to the lateral line, seepage pit, or galley networks.