Most manual heads feature a handle that rotates between three or four primary settings:
Use only Teflon tape on threaded fittings; liquid thread sealants or PVC glues can damage the plastic head. Manual Backwashing Tank Head
The standard operating mode where water flows through the filter media to the house or application. Most manual heads feature a handle that rotates
Directs water downward through the media to pack the bed back down and flush out any remaining debris or "fines" before returning to service. Manual Backwashing Tank Head