Stored beneath the ground, the septic tank, a sewage facility, is thankfully kept out of sight and out of mind—that is, until it’s time to empty it. Just like any type of storage system, there comes a point, as stuff is continuously put in, when there’s absolutely no room to keep anything.
When excrement is flushed, it settles at the bottom of the tank to create a thick, soft, and wet substance called sludge. And as it accumulates, it contributes to filling up the tank, which also has wastewater containing undecomposed material. With more waste in the tank, In more extreme cases, the sludge might actually travel to the surface
Generally, plumbing service professionals recommend that you empty, or “de-sludge,” your septic tank every year. For larger families, the septic tank might need to be serviced more often, since there’s potentially more waste to deal with. The frequency of emptying your septic tank might also be determined by its size or what kind of waste goes into it, like grease, oil or chemicals. Also considered is whether you recycle greywater, which is wastewater generated from household activities that involve water, such as taking a shower or washing plates. In more extreme cases, the sludge might actually travel to the surface, thus creating an even greater stink and a bigger mess for the septic tank cleaning company to handle.