Cleaning and backwash the filter
In order for your sand filter to work optimally, it is important to clean the filter sand regularly.
After about 5-10 days, or when the reading of the pressure gauge on the pump side of the filter has increased by about 0.2 bars (20 kPa, 3 psi) since the last backwash, backwash the filter as follows:
- Stop the pump.
- Close the valves on the suction and return lines.
- Open the cover of the pump and empty the filter basket.
- Refit the cover.
- Open the valve to the drain outlet.
- Turn the lever to BACKWASH.
- Open the valves to the suction and return lines.
- Start the pump. Rinse the filter for about 1 to 2 minutes or until the water in the sight glass is clear. NOTE: Any electric heater must be off.
- Stop the pump.
- Turn the lever to RINSE, start the pump and rinse for about 15-30 seconds. Stop the pump and turn the lever to FILTER. This is the normal operating position
- Close the drain outlet valve and start the pump. Switch on the electric heater if any.