Don’t guess. Don’t start the engine.

If DEF (Diesel Exhaust Fluid) or water enters your fuel tank, it can cause catastrophic damage to injectors, pumps, and fuel systems in seconds. :contentReference[oaicite:1]{index=1}

⚠️ Starting your engine with DEF contamination can lead to complete fuel system failure.

Test It in Seconds — Know for Sure

The Dieselcraft DEF & Water Test Kit gives you a simple, fast way to confirm contamination before damage occurs.

  • ✔ Detects DEF and water in all diesel fuels
  • ✔ Immediate PASS / FAIL results
  • ✔ Works in less than 1 minute
  • ✔ Non-toxic and safe to use

How the Test Works

This test detects even very small contamination levels:

  • As little as 0.1% DEF or water triggers a reaction
  • Strip turns green for contamination
  • Turns blue with higher DEF levels

👉 Instant visual confirmation — no lab testing required. :contentReference[oaicite:2]{index=2}

What’s Included

  • 1 Test Tube
  • 10 Test Strips
  • 1 Transfer Pipette

Everything you need to test your fuel immediately.

Step-by-Step: How to Test

  1. Collect a sample from the bottom of your tank
  2. Place test strip (colored end down) in tube
  3. Add fuel sample
  4. Watch color change instantly

Water: Pink/Brown reaction
DEF: Blue reaction :contentReference[oaicite:3]{index=3}

Who Needs This Test?

  • Fleet managers
  • Generator operators
  • Fuel storage facilities
  • Truck owners
  • Anyone who suspects fuel contamination

Why Testing Matters

Even small amounts of contamination can:

  • Destroy injectors
  • Clog fuel systems
  • Cause engine failure
  • Lead to thousands in repair costs

Testing your fuel is the fastest and cheapest way to avoid major damage.

Don’t Risk a $10,000 Repair

Test your fuel before starting your engine.

Order Your DEF Test Kit Now

Fast Shipping

All orders ship via Priority Mail with 1–3 day delivery across the USA. :

Related Resources

How to Remove Water from Diesel Fuel