4 inch RV Site Sewer Cap, Cast Metal, LockableThis item is backordered, expected availability is 5/15/20
Our 4 inch cast metal sewer cap is lockable to control dumping without your permission and perfect for individual RV sites. Threaded with standard pipe thread to screw onto threaded coupling. This cap should not be used at RV dump stations.
Hole to lock cap is approximately 0.5 inches diameter.