For many people who own septic systems, the waste is collected and processed through a septic tank, which then drains liquid waste into the soil. This is known as a drain field. Over time, septic systems can become full and back up causing all sorts of nasty problems. Aside from general maintenance of a septic system, it should be periodically pumped out to prevent any major problems that can result in costly repairs. Cleaning a drain field is a dirty job, but is essential to owning a septic system.
Find the location of the septic system underground.
Mark off the corners of the tank and start digging. When you reach the tank (approx. 18-plus inches down), you will see the sealed hatch. If you are unable to open this by hand, you may need to use a crowbar.
Have a professional septic cleaning service pump the waste out of the tank. Meanwhile use the drain field treatment directly on the drain field's soil, which acts as a shock treatment (see manufacturer directions for using the drain field treatment). If you have a distribution box as a part of your system, skip Step 4.
Locate the T-shaped outlet pipe (this is the one leading to the drain field). Insert the garden hose into the outlet pipe and attach the funnel.
Pour the drain field treatment into the funnel. This will flow into the outlet pipe and into the soil of the drain field, cleansing the field.