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

1.
fosa 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.
Nuestra casa utiliza un sistema de fosa séptica para aguas residuales.
•
The plumber had to pump out the septic tank.
El fontanero tuvo que bombear la fosa séptica.