Should You Run Cold Water With a Garbage Disposal?

The answer

Yes. Run a steady stream of cool water before and during grinding, then let it continue for a few seconds after the food waste is ground.

Why

InSinkErator's operating sequence is explicit: cool water first, disposal on, gradual food feeding, grinding to completion, then a short water flush before shutting the water off. The company also says not to put fats, oils, or grease into the disposal.

When it is usually OK

• You are grinding normal food waste approved for your disposal.
• The water supply and sink drain are working normally.
• You are following the operating sequence for the model.

When you should not

• The disposal or sink is already clogged and water is backing up.
• You are trying to use hot water to justify putting grease down the drain.
• Your model manual specifies a different procedure for a special mode.

Risks and exceptions

• Too little water may leave more ground material in the drain path.
• Pre-loading waste before starting water and the disposal can slow grinding.
• Fats, oils, and grease remain prohibited even with cold water running.

Best practice

Start cool water, switch on the disposal, feed approved food waste gradually, wait until grinding is finished, then run water for a few more seconds before turning it off.

Alternatives

• Compost or trash food waste that is not approved for your disposal.
• Use a sink strainer for non-grindable scraps.
• Clear a clog using the manufacturer's troubleshooting rather than adding more water and waste.

Frequently asked questions

Related guides