Unclog a septic drain field by running a snake through the toilet or using a declogging product. After removing the clog, prevent new clogs by performing regular septic tank maintenance and avoiding pouring grease and oil into the system.
In order to stop a septic tank field failure, the tank itself must be unclogged. Accomplish this task by purchasing a declogging solvent; since each product is different, follow the manufacturer's directions. This solvent works to dissolve things such as grease and oil.
Running a snake through the plumbing will also help unclog a septic drain field. Do this before calling the septic tank cleaning company to empty the tank. It also helps to include this procedure in regular tank maintenance, at least every two months.
In a worst-case scenario, the septic tank will need to be replaced. There is no repair for a drain field that fails. In this case, it is better to turn the problem over to a professional. Contact the local health department to find out what procedures must be followed for major septic tank work and hire a reputable company for the repairs. It may be possible to save the tank itself, which will save a substantial amount of money.