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Septic tips

Aerobic vs Conventional Septic System: Which One Do You Have?

By the Foster’s Team · October 19, 2026

A sprinkler head watering a back yard lawn
Photo: theshuttervision on Pexels

Lots of people in Hays, Caldwell, and Bastrop counties don’t know what kind of septic system they have. That’s OK. It’s easy to check.

Signs you have an aerobic system

  • A control box or alarm panel on a post or on the side of the house
  • A small humming air pump near the tanks
  • Sprinkler heads in the yard that spray treated water, often very early in the morning
  • A white tube in the ground where chlorine tablets go

Signs you have a conventional system

  • No control box and no air pump
  • One tank, or one tank with two parts, buried in the yard
  • Water goes into pipes under the ground in a drain field, not out of sprinklers

Some homes have a conventional tank plus a pump tank. That’s common in the Hill Country, where the soil is thin and rocky. These have a pump and often an alarm, but no air pump.

Why it matters

An aerobic system has moving parts. Texas requires a care plan for most of them, with checks 3 times a year. A conventional system has no state check, but it still needs a pump every few years.

Still not sure? We can tell you in a few minutes during a free checkup.

The Foster’s Team
Foster’s Septic, Maxwell, TX

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Call us or book a free septic checkup. We’ll tell you what we see, in plain words.

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