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  • Pumping the Tank of Your Individual Sewage Disposal System

     

    Since some materials in sewage cannot be decomposed, they must be periodically removed by a licensed systems cleaner, who will pump this material from the tank.

    If you have a two-compartment tank, both sides should be pumped. The pumper should also remove all the water from the tank; this will allow a "rest period" for the leaching field.

    Failure to regularly pump the tank may result in sludge being carried into the leaching field where it can plug the soil pores and cause failure. Since repairing a failing absorption bed may cost many thousands of dollars, the cost of routine pumping represents a very reasonable investment in protecting your ISDS.

    See the following chart for recommended pumping frequency or tank cleaning.

    Tank Size (Gallons) Household Size (Number of People)
      1 2 3 4 5 6
    500 5.8 years 2.6 years 1.5 years 1.0 year 0.7 year 0.4 year
    750 9.1 4.2 2.6 1.8 1.3 1.0
    900 11.0 5.2 3.3 2.3 1.7 1.3
    1000 12.4 5.9 3.7 2.6 2.0 1.5
    1250 15.6 7.5 4.8 3.4 2.6 2.0
    1500 18.9 9.1 5.9 4.2 3.3 2.6
    1750 22.1 10.7 6.9 5.0 3.9 3.1
    2000 25.4 12.4 8.0 5.9 4.5 3.7
    2250 28.6 14.0 9.1 6.7 5.2 4.2
    2500 31.9 15.6 10.2 7.5 5.9 4.8

     


    Last Updated: 4-24-2013