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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.

The cost to pump a septic tank is $400 on average for most homeowners. You could spend as low as $250 if you have a smaller septic tank or as much as $600 or more if your tank is 1,750 gallons. 

The size of your septic tank is the primary determining price factor, but your geographic location can also play a part in your overall cost. For example, pumping a septic tank in Minneapolis, Minnesota, costs between $175 and $275 on average, but in Portland, Oregon, you'll spend between $440 and $750.

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.

The best time of year to pump a septic tank is spring because the ground is thawed and snowmelt and rainfall can help with proper drainage. Having your septic tank pumped before the summer months is ideal to avoid conflicting with vacations and outdoor summer gatherings. Fall is also a great time to pump your septic tank, and it can be less busy for contractors than the spring.