septic tank
US /ˈsep.tɪk ˌtæŋk/
UK /ˈsep.tɪk ˌtæŋk/

1.
fossa séptica
an underground tank in which sewage is collected and allowed to decompose through bacterial activity before draining by means of a leaching field.
:
•
Our house uses a septic tank system for wastewater.
Nossa casa usa um sistema de fossa séptica para águas residuais.
•
The plumber had to pump out the septic tank.
O encanador teve que bombear a fossa séptica.