By Sarah Brenneman · October 27, 2026
Solids settle to the bottom of a septic tank and grease floats to the top. Pumping removes both before they reach the drain field, which is the expensive part of the system.
For a family of four with a 1,000 gallon tank, every three years is a good rule. Five or more people, a smaller tank or a garbage disposal can bring that down to two.
If you do not know when it was last pumped, assume it is due. We write the date and the sludge levels on every report so the next schedule is based on your tank, not a guess.
Waiting until drains slow down is the costly way to find out. By then, solids may already be moving into the field.
