it takes forever for my imusa to get up to pressure, like 45 minutes just to start rocking. is that normal?

Diagnosis

No, 45 minutes is not normal; a standard IMUSA 7 Quart aluminum pressure cooker should reach pressure within 10 to 15 minutes depending on the liquid volume. When a pot takes this long to start "rocking" (the movement of the pressure regulator), it indicates a failure to maintain a critical temperature threshold or a massive loss of steam through a leak. Aluminum is an excellent heat conductor, but if the heat source is too low or the pot is overloaded, the energy is absorbed by the food rather than building the necessary internal pressure. The root cause is usually a combination of "cold-starting" the pot and using a burner that doesn't match the wide base of the 7-quart model. If you are using a small burner on a large pot, the edges of the aluminum base remain cool, slowing the heating process. Additionally, if the gasket is slightly warped or the lid isn't seated perfectly, steam escapes through the sides instead of forcing the regulator valve to lift, preventing the "rocking" motion from initiating. You can confirm a leak by observing if steam is escaping from the rim of the lid before the regulator begins to move.

How to Fix It

To get your IMUSA cooker up to pressure efficiently, follow this precise sequence:

1. The Pre-Boil Method: Place your ingredients and liquid in the pot. Leave the lid off and set your burner to the highest possible setting. Wait until the liquid reaches a vigorous, rolling boil. This eliminates the "warm-up" phase and ensures the internal temperature is already near 212°F (100°C) before sealing.
2. The Seal: Once boiling, place the lid on the pot and rotate it firmly clockwise to lock it. Ensure the gasket is seated flush against the rim.
3. Regulator Placement: Place the pressure regulator (the weighted jiggler) on the vent pipe. Ensure it sits level and isn't tilted, as a tilted regulator can stick or leak inconsistently.
4. High-Heat Phase: Keep the burner on high. Do not lower the heat yet. Watch for the first sign of steam escaping from under the regulator.
5. The Rocking Point: Once the regulator begins to rock or jiggle steadily, the pot has reached full pressure. This is the exact moment you must reduce the heat to a medium or medium-low setting—just enough to maintain the rocking motion without violently spraying steam.

If That Didn't Work

• Inspect the Gasket: Examine the rubber sealing ring for cracks, stretching, or food debris. If the gasket is loose or "flattened," it won't create an airtight seal. Replace it with a genuine IMUSA replacement gasket if you see any signs of dry rot or pitting.
• Check Vent Pipe Obstructions: Remove the regulator and look down the vent pipe. Small pieces of food or mineral deposits from hard water can clog the pipe, preventing steam from pushing the regulator up. Use a thin pipe cleaner or a paperclip to clear any debris from the hole.
• Verify Liquid Ratios: Ensure you have at least 1.5 to 2 cups of liquid. If you are cooking "dry" foods or thick stews, the lack of water prevents the creation of enough steam to lift the regulator. Add a splash of water or broth to increase steam production.
• Burner Compatibility: If you are using an electric coil stove, ensure the coil matches the diameter of the pot. If the heat is concentrated only in the center, the aluminum walls won't heat evenly, delaying pressure build-up. Consider using a heat diffuser plate if your burner is too small.

Heads Up

• Never Overfill: Never fill the 7-quart pot more than 2/3 full. Overfilling prevents steam from circulating, which drastically increases the time it takes to reach pressure and can lead to dangerous foam-overs.
• Aluminum Care: Avoid using steel wool or harsh abrasives on the interior of the aluminum pot, as scratches can harbor food particles that interfere with the seal.
• Regulator Weight: Do not modify the weight of the regulator. The "rocking" is calibrated to a specific PSI; adding weight or altering the valve can lead to dangerous internal pressure levels.
• Gasket Maintenance: After every use, remove the gasket and wash it with warm soapy water. Dried food on the gasket is the primary cause of steam leaks and slow pressure times.