: Corrosive Hole in Lid
: Corrosion on Outlet Wall
What causes corrosion?
Hydrogen sulfide is the most common culprit of corrosion in septic tanks. Hydrogen sulfide is a bi-product of the bacterial breakdown of organics when oxygen is not present. When dissolved in water, hydrogen sulfide is known as hydro sulfuric acid or sulfhydryl acid. The corrosion is most common above the waterline of the tank, which is where the gas mixes with water vapor, creating the hydro sulfuric acid.
Can I prevent corrosion?
Pumping your septic tank on a regular schedule (every 3-5 years) is the best way to combat corrosion. Also, if your tank is equipped with an outlet filter, cleaning that once a year will help also.
What is the impact of corrosion on your system?
Corrosion can cause many long lasting effects on your septic system. In extreme cases, corrosion can cause the tank to collapse or cave in. In some cases the corrosion, which turns the concrete into a paste, can deposit the debris directly into your drainfield causing it to fail prematurely.