Watch the construction of a new drain well (Also known as seepage pit) being brick lined with concrete bricks. These bricks allow water to pass through them through small channels in between the bricks. Water comes out of the septic tank and into the drain well where it then peculates back into the ground. Drain wells are usually 3 to 4 feet in diameter and around 20 to 25 feet in depth depending on the soil type. It is ideal for the bottom of the drain well to reach sandy soil for maximum drainage.
Not all septic systems have drain wells or seepage pits for drainage. Many septic systems utilize leech lines to drain the waste water back into the ground. The soil type and ground water levels are the main determinants in what type of drainage system will be used. The principle is the same regardless of whether the system has leech lines or drain wells. Both provide ample area for water to percolate back into the soil. Usually, after a drain well has been drilled, there is a spoils pile of about 25 tons of dirt. Most of the time this dirt is left on the property and can be left in a pile or spread out with our backhoe in an empty area. This dirt can be very useful to property owners who have low spots or other reasons to need extra dirt such as landscaping. The extra dirt can also be hauled away if there is no good place for it on the property. It is a good for a property owner to know the locations of any drain wells on the property to ensure they are not driven over and that no trees are planted too close to them. Knowing the drain well location is also helpful in the event that you ever need to have additional drain wells drilled for more drainage.