Ninja OS401 how to remove and reinstall the silicone ring
To wash the ring after use or to replace it.
Steps
To prevent risk of explosion and injury, use only SharkNinja silicone rings. Make certain silicone ring is installed and lid is properly closed before operating. DO NOT use if torn or damaged. Replace silicone ring before using.
Marked WARNING by the manufacturer Source: Important Safeguards: item 16, p. 2
- Pull the ring outward, section by section, from the silicone ring rack on the underside of the pressure lid.
- Do not pull the ring out with excessive force, which can deform the ring and the rack and affect the pressure-sealing function.
- Remove any food debris from the silicone ring and the anti-clog cap.
- To remove odor, wash the ring in warm, soapy water or in the dishwasher.
- Set the ring around the outer edge of the silicone ring rack with either side facing up, and press it down into the rack section by section.
- Check that the ring is fully inserted and lies flat under the silicone ring rack.
A silicone ring with cracks, cuts or other damage should be replaced immediately. It is normal for the ring to absorb the smell of certain acidic foods, and the guide recommends keeping more than one ring on hand.
Source: Before First Use: step 4; Cleaning & Maintenance: Removing & Reinstalling the Silicone Ring Source: Before First Use: step 4; Cleaning & Maintenance: Removing & Reinstalling the Silicone Ring, pp. 9, 21
Used for
- WATR: The WATR message appears with the Steam function or the Pressure function.
- The unit takes a long time to come to pressure
- The unit is hissing and not reaching pressure
Other OS401 procedures
- How to release pressure with the quick releaseOnly when the recipe calls for it, after pressure cooking is complete and the KEEP WARM light is on.
- How to release pressure naturallyWhen pressure cooking is complete and the recipe does not call for a quick release.
- How to install the pressure lidBefore using the Pressure Cook, Steam, Sous Vide, Slow Cook or Yogurt function.
- How to remove the pressure lidAfter the pressure has been released and the float valve has dropped.
- How to pressure cookWhen a recipe uses the Pressure Cook function.
- How to run a first Pressure Cook test with waterBefore first use. The guide recommends an initial run to get familiar with pressure cooking.
- How to remove and clean the anti-clog capAfter every use, and when checking the valves before cooking.
- How to install and remove the condensation collectorBefore first use, and to hand-wash the collector after each use.
- How to clean the unit after useAfter every use.
Sources
- OS401 Owner's Guide: Foodi 10-in-1 8-QT XL Pressure Cooker. SharkNinja Operating LLC. Document OS401_IB, revision MP_REV_Mv12, 25 pages, en. ninjakitchen.com. Listed on the manufacturer's support page. Retrieved 13 November 2026.
Page numbers are the numbers printed in the manual. Where this page and the manual differ, follow the manual.