septic tank

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septic tank

A diagram shows how a septic tank works underground.

Definition
  1. Noun:
    • A large, underground tank, typically made of concrete, fiberglass, or plastic, that receives and partially treats wastewater from a building that is not connected to a municipal sewer system. Solid matter is decomposed by anaerobic bacterial action, while the liquid effluent drains out into a leach field for further soil filtration.
Usage
  • The term "septic tank" is used to describe the primary component of an on-site sewage facility (OSSF) or septic system. It is a specific type of holding and treatment tank for domestic wastewater.
Examples
  • Noun:
    • The rural house has a septic tank instead of a connection to the city sewer.
    • A septic tank needs to be pumped out every few years to remove accumulated sludge.
    • The health inspector checked the property's septic tank for proper function.
Advanced Usage
  • "to have a septic tank installed": to set up a septic system for a property.
    • They had to have a septic tank installed before the building permit was approved.
  • "septic tank failure": a situation where the tank or its drainage field ceases to function properly, often leading to backups or environmental contamination.
    • The foul odor in the yard was a sign of potential septic tank failure.
Variants and Related Words
  • Septic system (n): The entire wastewater treatment system, which includes the septic tank and the drainage (leach) field.
    • Maintaining the septic system is the homeowner's responsibility.
  • Cesspool (n): An older, less efficient underground container for sewage that simply stores waste without significant bacterial treatment. It is not synonymous with a modern septic tank but is a related concept.
    • The old farmhouse was originally served by a cesspool.
Synonyms
  • Waste treatment tank: A more general term.
  • Sewage holding tank: Emphasizes the containment function.
Related Phrases
  • Septic tank maintenance: The regular activities required to keep a septic system operational.
    • Regular septic tank maintenance prevents costly repairs.
  • Septic tank effluent: The liquid wastewater that flows out of the septic tank.
    • The septic tank effluent is directed to the drain field.
septic tank

A diagram shows how a septic tank works underground.

Noun
  1. large tank where solid matter or sewage is disintegrated by bacteria