To fill the foam extinguishers please follow the steps as listed below:
- Unscrew the extinguisher head
- Add 8.4 litres of water first
- Add 600ml foam (total 9 litres - there is a mark on the pickup tube to indicate the correct level.)
- Re-seal the head assembly by screwing down.
- Apply air pressure to the tyre type value in the head until the pressure gauge goes into the green.