
I have a project where this lid is pressurized with water about 4 feet up and then the Pumo vacuum pulls the water out of the bucket. NO other lids I have tried have worked. Gama Seal caps from Lowes, Home Depot, Tractor Supply, and Wal-Mart have failed due to mold defects that cause sealing problems at the cap. This lid was perfect and had no sealing issues.