How often should a Septic Tank be Pumped

This depends on the following:

  • Capacity of septic tank
  • Flow of wastewater
  • Volume of solids in wastewater

Volume of wastewater flow is determined by the type and frequency of common household activities. Water conservation practices in the home will help to limit the flow into the system. Use of an in-sink garbage disposal will increase the volume of solids and is best avoided. Care should be given to the type and amount of solids disposed of through a garbage disposal. Please note that biological and chemical septic tank additives are not necessary and do not eliminate the need for pumping.

 

The table below will give you a general idea of how often you should have your Septic Tank pumped.

 

Septic Tank Pumping Frequency in Years
Number of Occupants
  1 2 3 4 5 6 7 8 9 10
Tank-Gallons Pumping Frequency in Years
500 5.8 2.6 1.5 1.0 0.7 0.4 0.3 0.2 0.1 --
750 9.1 4.2 2.6 1.8 1.3 1.0 0.7 0.6 0.4 0.3
900 11.0 5.2 3.3 2.3 1.7 1.3 1.0 0.8 0.7 0.5
1000 12.4 5.9 3.7 2.6 2.0 1.5 1.2 1.0 0.8 0.7
1250 15.6 7.5 4.8 3.4 2.6 2.0 1.7 1.4 1.2 1.0
1500 18.9 9.1 5.9 4.2 3.3 2.6 2.1 1.8 1.5 1.3
1750 22.1 10.7 6.9 5.0 3.9 3.1 2.6 2.2 1.9 1.6
2000 25.4 12.4 8.0 5.9 4.5 3.7 3.1 2.6 2.2 2.0
2250 28.6 14.0 9.1 6.7 5.2 4.2 3.5 3.0 2.6 2.3
2500 30.9 15.6 10.2 7.5 5.9 4.8 4.0 3.5 3.0 2.6

 

Keep in mind that these are average numbers. You may need to have your tank pumped more or less frequently depending on how you use your system. The more solid matter you put in the more often you'll need to pump. It's better to err on the side of caution and pump too often than it is to wait too long and risk a fouled leach field. Having to replace your leach field is many times the cost of pumping.

Mr. Pumper Septic & Drain was very friendly, knowledgeable, and provided Exceptional service! They responded to our frantic call and provided us with great service and was able to explain to us ways of preventing any further failures with our system.

— Felton2010, Felton, CA

 

(831) 335-0861 (831) 335-2972

 

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