how big should a septic drain field be
A septic drain field should be 10 feet from the home or any body of water, and 10 feet from gardens and edible plants. Dig the trenches. Each drain-field trench should be at least 3 to 4 feet wide and 3 to 4 feet deep.There should be at least 100 feet of drain field for a 1,000-gallon septic tank. This can be accomplished by making four trenches 25 feet long or two trenches 50 feet long.uilding a septic drain field is time-consuming but pays off in the long run. Septic tanks last from 15 to 30 years. Unfortunately, drain fields, also known as leach fields, do not last that long. If placed in an area with good ground absorption, a drain field can last up to 10 years.