To air purge your Plunge All-In please follow the steps below: 

1. Keep the tub running
2. Double check that the colored ball valve on the connection is open. (Parallel to the connections)
3. Remove the decorative lid 
4. The filter screw cap may be pressurized closed, so you can use the filter wrench and slowly unscrew the lid
5. Once you hear the bubbles escape and see water begin seeping out, close the lid back up

If you have any questions or concerns, please reach out to us at support@plunge.com.