Check Valve Insert. Allows gas to flow in only one direction. Prevents backflow. Sold as a 6-Pack. (Coarse Thread Long)

Robinair does not warrant any "RA" repair item not installed by an Authorized Service Center.

Warning: This product may expose you to chemicals including lead which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov