Can you build a septic system without professional help?

Planning and Design

Building a septic system without professional help requires careful planning and design. First, determine the size of the system based on the number of people it will serve. A general rule of thumb is 1 person per 200 square feet of drainage area. For example, a 1000 square foot home would require a 5-person system (1000 sq ft / 200 sq ft per person = 5 people).

Next, decide on the type of septic system to build. There are two main types: gravity-fed and pump-fed. Gravity-fed systems are more common and require a larger drainfield, while pump-fed systems are more efficient and require a smaller drainfield. Determine the best location for the septic tank and drainfield, making sure it is at least 50 feet away from the house, well, and any water features.

Digging the Septic Tank and Drainfield

To dig the septic tank and drainfield, use a backhoe or a trenching machine with a rotating bucket. Dig the tank and drainfield at least 12 inches deep and 2-3 feet wide. The tank should be at least 6 feet long and 4 feet wide, and the drainfield should be at least 20 feet long and 10 feet wide.

Installing the System

Once the tank and drainfield are dug, install the system components, including the septic tank, drainfield pipes, and distribution box. Use PVC or corrugated metal pipes, which are more durable and resistant to root intrusion. Install a 4-inch pipe from the house to the septic tank, and a 6-inch pipe from the tank to the drainfield. Connect the pipes to the distribution box, which disperses the wastewater evenly throughout the drainfield.

Remember to follow local regulations and obtain necessary permits before starting the project. Also, consider hiring a professional if you are unsure about any aspect of the septic system installation.