
Not sure about old fuel?
Diesel Fuel Water Content & Fuel Clarity Test #FCT-100
Will work for clear and with red dyed fuel.


Test is designed as a field PASS or FAIL.
- Test detects water and solid contaminants in diesel fuels.
- Very simple and immediate
- If all 5 indicator marks are visible the test PASSES but if the indicator lines disappear then the fuel FAILS.
- Failed tests require Fuel Polishing/Maintenance.
See the water detection capsule demo: https://youtu.be/m8AYSciiMCs
Deluxe package: Clarity, Water PLUS Bacteria/Algae Test: