septic tank

US /ˈsep.tɪk ˌtæŋk/
UK /ˈsep.tɪk ˌtæŋk/
"septic tank" picture
1.

an underground tank in which sewage is collected and allowed to decompose through bacterial activity before draining by means of a leaching field.

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Our house uses a septic tank system for wastewater.
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The plumber had to pump out the septic tank.
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cesspoolcesspit
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