water test kit water testing paste diesel fuel


Diesel Tank Testing's Water Finding Paste is used to test for the presence of water in the bottom of your Diesel Fuel tank. It provides you with an easy way to test for water in your tank but does not subsitute for regular more indepth fuel and tank integrity testing.

Fill out the form below to recieve your FREE Diesel Tank Water Testing Kit.


diesel water finding paste dipstickInstructions:

  1. Apply to the tanks dipstick and insert into tank ensuring the stick reaches the bottom of the tank.
    (Water has a greater density than fuel so within any tank water will naturally gravitate to the bottom)
  2. Carefully remove the dipstick from the tank.
  3. Check the colour of the Water Finding Paste.  The brown/green paste turns a bright magenta if has come into contact with water.
    (the dipstick should aslo give you a visual indication as to the depth of the water present)
  4. If you see any Magenta you should give us a call!

fuel testing-diesel

Upon any tank integrity test a fuel sample will be taken for testing.

A simple scheduled 3 test will show water, fungal and bacterial contamination, moisture content and clarity. A comprehensive scheduled 3 can confirm the complete quality of the diesel. This will then indicate if it requires further attention.


Diesel fuel when having been in storage for an extended period of time, holds the increasing possibility of contamination.

Common causes of contamination in diesel can be water, fungal and bacteria.