PVC ½″ non-return valve used with pumps as a connection to the outlet of your water tank to keep the pump primed and to stop the water siphoning back into your water source.
When to use a non-return valve:
- To stop the water from siphoning back to the water source when pump is mounted higher than the water source
- To keep the pump primed
- To minimise air in your system
- To maintain pump head pressure