The septic tank collects all the wa

The septic tank collects all the waste water from your home – from the toilets, bathtubs, sinks, and washing machine. The heaviest matter in the waste settles to the bottom as sludge while oil and protein floats at the top as scum. The middle layer or effluent is released into the leech field where the soil filters the water and the organic matter fertilizes the yard. However, over time, the sludge accumulates because the bacteria cannot decompose the sand, grit, plastic, and other inorganic matter that also forms part of the sludge. This can only be removed by pumping the septic tank and emptying so that it can receive more sewerage from the home.