Septic Tank Care: How to Dispose of Grease And Oil

Which materials can damage your septic system if they are poured down the drain? Cooking grease and oil are prime culprits. This is because these materials can harden in your pipes, causing clogs. And they can also interfere with the delicate balance of bacteria in your septic tank, leading to much larger, septic system-wide issues.

A well-built septic tank, like Rotoplas’ new line of septic tanks designed with high-density polyethylene, will certainly help to mitigate any damage from grease and oil. But even the best septic systems can have issues with these thick and troublesome substances. Since grease and oil are common ingredients in the kitchen, they are often poured into the kitchen sink repeatedly, compounding the problem.

However, with a little awareness, family chefs can keep these potential issues at bay simply by keeping cooking grease and oil out of the drain.

So how do you properly dispose of these common kitchen staples? There are a few tricks that chefs can employ to keep these substances out of their pipes, and out of their septic system.


Three Safe Ways to Dispose of Cooking Grease and Oil

1. See if your community recycles

Some cities, counties, and communities have recycling programs for these materials, especially cooking and motor oils.

Contact your local government first to see if this is the case, and to see what steps they recommend to dispose of these items. Chances are, you’ll be able to seal oils in a tight container, and drop them off at your local recycling center. Or in some cases, you can even have them picked up on special pick-up routes or schedules.


2. Try reusing

Did you know that many cooking oils can actually be used again?

This is especially true for oils that are used for deep frying, like vegetable, canola, and peanut oil, as well as a wide array of fats, including bacon grease or duck fat.

If you plan on using your oil in the immediate future, (or within an hour or so), you can leave it out at room temperature until you’re ready to cook.

Otherwise, store bacon and duck fat in a sealed glass container in the refrigerator or freezer. You can store cooking oil in an airtight container in a cool and dark place.


3. Let the grease harden

Fatty greases and oils will harden after they have cooled, which makes them easy to dispose of.

Simply leave them out in a container and let them harden on their own. Afterwards, you can dispose of them in the trash.

If you have a large amount, or if your greases are not congealing right away, try sticking them in the refrigerator for a little while. This will help speed up the process.

But make sure that when you throw them away, they are sealed in a container. You don’t want them to leak and affect the environment after they leave the wastebasket.


Cooking oil and grease can do a lot of damage when it comes to septic systems. So always keep these substances away from the drains. By recycling, reusing, or properly tossing them away, you can ensure your septic system remains in good shape for the years to come.


Need to replace a septic system, or ready to put one in for your home? We can help find the right tank for you. Contact us for all your septic tank needs.

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Septic Tank Care: How to Dispose of Grease And Oil
Cooking oils and grease can damage a septic system, so how do we get rid of these kitchen staples? See our tips for disposing of these harmful materials.

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