A PVC Pressure Barrel Union is used to break the line and allow access for maintenance. The locking nut can be unscrewed to allow a section of pipe or a fitting to be removed. Often a barrel union is used in front of a check valve or a pump to isolate it and to have the ability to break the line.
Commonly used in irrigation or pool applications.,A PVC Pressure Barrel Union is used to break the line and allow access for maintenance. The lockin