A septic tank always has some amount of liquid in it—which should usually be 8 to 12 inches from the top of the tank. If the liquid level is higher than that or is overflowing the drainage pipe that leads out to the leach field, the tank may be too full and in need of pumping.
A household of four can easily fill a 1,000-gallon septic tank within a week. It may be 10 to 14 days for smaller households. But the reason why you don't need weekly pumping is because the tank's contents eventually reach the overflow pipe. They flow down this pipe to the absorption area whenever water is used in your home. The tank keeps working at this full level until it's pumped again.
You can check your own septic tank, but take precautions. Locate the access lid, usually buried a few inches underground, and remove it carefully. Look for the sludge and scum levels, and if they’re high, that means pumping may be necessary. Check for odors, slow drains, or pooling water around the drain field, which could indicate issues. Never enter the tank, as toxic gases can be fatal. All of that being said, a professional inspection is safer and more thorough.
To break down fat in a septic tank, you will need to hire a professional septic tank cleaner near you to either pump the septic tank or use a shock treatment to clear the clog. It’s important to not pour fat, oil, or grease (memorable with the helpful acronym FOG) down your drains because they can clog the septic system. Instead, you can dispose of them with regular trash, or if your household produces a lot of FOG waste, you may want to install a grease trap for your plumbing.
A septic system's lifespan typically ranges from 15 to 40 years, with a common average of 20 to 30 years. The longevity heavily depends on the tank's material, maintenance diligence, and usage habits. With proper care, lifespans can reach the upper end of this range.
Lifespan by Tank Material:
Concrete: 20 to 40 years
Plastic or Fiberglass: 30 to 40 years
Steel: 15 to 20 years
To maximize your system's lifespan, follow these maintenance best practices:
Regular Pumping and Inspections: Have the tank pumped every three to five years and schedule professional inspections regularly.
Mindful Usage: Only flush human waste and toilet paper. Avoid putting items like cat litter, paper towels, cigarette butts, fats, grease, oils, or coffee grounds down your drains.
Avoid Chemicals: Do not pour harsh chemicals into the system.
Water Conservation: Reduce the amount of wastewater your system has to process.
Protect the Drain Field: Avoid driving or building heavy structures over the drain field area.
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