Remove the impeller from the body of the pump - clean and replace if
required.
Reassemble the pump and return to your pond
Reconnect to the power supply.
O-rings
It is vital that O-rings are regularly inspected and replaced as the rubber
watertight seal will perish over time, which may cause your unit to leak. Before
replacing your o-rings, ensure they are well lubricated.
Protection From Frost Damage
To protect the unit from frost during the winter months, disconnect from your
water and electricity supplies and store indoors during the winter.
Once you have removed the unit from your pond, let the pump run in a vessel of
clean water for a few minutes. Next, clean and dry the unit, before storing out of
direct sunlight.