Can I open a pressure cooker by running it under cold water? Is it safe?

Question

Get safety tips for rapid depressurization using cold water techniques.

Answer 1

You can open a pressure cooker by running it under cold water for a quick pressure release, and it is generally safe when done correctly, as the cold water rapidly cools the cooker and condenses the steam, causing the pressure to drop quickly.

Detailed Explanation:

Running a pressure cooker under cold water is a widely accepted and safe method for a quick pressure release, particularly for stovetop models, often referred to as the 'cold water release' method.

1. Mechanism: When cold water is run over the lid and sides of the pressure cooker, it rapidly cools down the interior of the cooker. This sudden cooling causes the steam inside to condense back into water, which leads to a rapid drop in internal pressure.
2. Safety: This method is safe provided you follow proper procedure:
   • Turn off heat: Always remove the pressure cooker from the heat source first.
   • Even Flow: Run a steady stream of cold tap water over the lid, avoiding directing the water directly onto the steam vent. Ensure the water flows over the entire lid for even cooling.
   • No Submersion: Do not submerge the entire cooker in water.
   • Float Valve Check: Continue running water until the pressure indicator (float valve) drops completely, signaling that all pressure has been released. This typically takes a minute or two.
3. Benefits: It's a very fast way to release pressure, which is beneficial for delicate foods like vegetables that you want to prevent from overcooking.
4. Not for All Cookers: This method is primarily for stovetop pressure cookers. It is generally not recommended or even possible for electric pressure cookers (like Instant Pots) as they are electrical appliances.

Pro Tip:

Avoid running cold water over the cooker while it is still on the heat, as this can cause thermal shock and potentially damage the cooker or create dangerous pressure fluctuations.