Pumped How Often?
The following table indicates how often (in years) you need to pump out your septic tank on average, given the size of the tank and the number of people living in the house. If there is a garbage disposal in the house will decrease the amount of time before each pumping by approximately 50%.
Number of People in House
Tank Size (gals)
1
2
3
4
5
6
500
5.8
2.6
1.5
1.0
0.7
0.4
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
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