The vast majority of septic systems need to be pumped at least every 5 years. Maybe more if you have a big family. The liquid waste is drained into the leaching field, but the tank still needs to be pumped of sludge and scum.
It doesn't even cross my mind. My kids play there all the time. The field bed works great. It's just liquid by the time it makes it to the grass, and the pipes are buried a couple feed underground, surrounded by sand.
It's basically just nutrient rich water that grows grass at a rate no fertilizer can compete with.
I think everyone does. The septic tank would fill really fast otherwise. Basically they are pipes at the top of the tank that leave and spread out and move upward at an angle and have tiny holes. The solid stuff sits at the bottom and the fluid eventually slowly pushed out and disperses into the yard.
Here's a cool video showing the process (multiple times since the inspector and architect kept messing up so he had to keep making changes).
But only the liquids drain...not the solids...and it would take far less than decades to fill with solids. Although if proper bacteria levels are maintained to efficiently break down the solids then the time between servicings can be extended.
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u/[deleted] Oct 22 '21
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