How to use
Step 1 Fill the tube with central heating system water up to the 50ml line.
Step 2 Look down the tube and focus on the black and yellow Target.
Step 3 Depending on the cleanliness of the water there are four water treatment options:
1. If the Target is clearly visible and the system has been inhibited (boiler displaying a water treatment label) Action: None required
2. The Target is clearly visible but the boiler has no re-treatment label and may not be adequately inhibited. Action: Protect the system with Fernox Protector F1
3. The Target is visible but blurred, indicating containmants are present in the system water. Action: Fit a Fernox TF1 Filter and dose with Fernox Filter Fluid+ Protector.
4. The Target is not visible indicating a heavily sludged and dirty system. Action: Clean the system with Fernox F3/F5 Cleaner, fit a Fernox TF1 Filter and dose with Fernox Filter Fluid+ Protector.