Answer

Can You Put Grease Down a Garbage Disposal?

MEMapiance Editorial Team ·Updated Sep 28, 2026·2 min read

A garbage disposal can grind approved solid food waste, but that does not make fats, oils or grease an acceptable input. Manufacturer and EPA guidance both tell users to keep cooking grease and oil out of the drain system.

Quick answer

No. Do not put grease, fat or cooking oil into a garbage disposal or drain. InSinkErator says never to put fats, oils or grease into the unit, and EPA septic guidance also says not to pour cooking grease or oil down drains.

no

The answer

Do not pour cooking grease, fats or oils into a garbage disposal or drain. The disposal does not make grease safe for the plumbing system.

Why

InSinkErator states that fats, oils and grease should never go into the disposal. EPA septic guidance separately says not to pour cooking grease or oil down drains. A garbage disposal therefore does not change the no-grease rule.

When you should not

  • Cooking grease or oil is still liquid or warm.
  • Fat has cooled and become semi-solid.
  • Cold water is running; water temperature does not change the no-grease rule.
  • The disposal has a strong motor; horsepower does not make grease appropriate drain waste.

Risks and exceptions

  • Putting fats, oils or grease into the disposal conflicts with the manufacturer’s operating guidance.
  • Pouring cooking grease or oil down drains conflicts with EPA septic-care guidance.
  • Running cold water does not turn grease into an approved disposal input.

Best practice

Keep cooking grease, fats and oils out of the disposal and drain. Let grease cool, collect it in a container, and follow local waste or collection instructions rather than sending it through the sink.

Alternatives

  • Collect cooled grease in a disposable container
  • Use a local fats-oils-grease collection program if available
  • Scrape food and grease into trash or compost where locally appropriate

Frequently asked questions

Does cold water make grease safe for the disposal?

No. Manufacturer guidance still says never to put fats, oils or grease into the disposal.

Can a powerful garbage disposal grind grease?

No. InSinkErator’s guidance says fats, oils and grease should never go into the disposal, regardless of motor power.

What should I do with cooking grease?

Allow it to cool and dispose of it in the trash or through an approved local collection or recycling option.

Sources

  1. How To Use a Garbage Disposal — InSinkEratorOfficial
  2. How to Care for Your Septic System — U.S. Environmental Protection AgencyOfficial
Tagged
Drain CareGarbage DisposalGreaseKitchen Plumbing

Related guides

Kitchen & Cooking

Can You Put Coffee Grounds in a Garbage Disposal?

Coffee grounds are accepted by some garbage-disposal manufacturers, including current InSinkErator guidance, but septic-system guidance from EPA advises keeping coffee grounds out of drains.

2 min read
Kitchen & Cooking

Should You Use Cold Water With a Garbage Disposal?

Use cold or cool water while a garbage disposal is grinding food waste; manufacturer guidance calls for water before, during and briefly after operation.

2 min read
Kitchen & Cooking

Why Does My Garbage Disposal Smell Bad?

A bad garbage-disposal odor is often caused by food buildup in the grind chamber or under the sink baffle, especially when too little water is used during and after grinding.

3 min read
Kitchen & Cooking

Can You Soak Rice Before Cooking?

Rice can be soaked before cooking, but whether a separate pre-soak is needed depends on the rice and cooker. Many Micom rice cookers already automate soaking.

3 min read
ME

Written by Mapiance Editorial Team

The Mapiance Editorial Team researches, writes, reviews, and maintains practical guides and explainers for MAPIANCE.

Reviewed by Mapiance Editorial Team

Published Sep 28, 2026 · Updated Sep 28, 2026 · Verified Sep 26, 2026