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Thread: Draining the DEF tank?

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    Basic Member kessler89's Avatar

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    Draining the DEF tank?

    Deleted my truck a few weeks ago and my def tank is just below 1/2, is there any way I can drain it while leaving it installed in the truck?


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    Waterhippy's Avatar

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    Re: Draining the DEF tank?

    I pulled the fill line off at the tank by squeezing on the connection. It pops right out. I drained quite a bit from the opening. I then used a water hose to flush the tank for a minute or two. After flushing I used a sphin hose and bulb pump to completely drain the tank. When I felt like it was all out I plugged the hose back up. I have seen no issues since dumping the DEF tank several weeks ago.


  3. Thanks kessler89, RamIt, dieseljeeper, Peter Champion thanked for this post
  4. Top Of Page | #3
    Crshanta's Avatar

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    Re: Draining the DEF tank?

    Use pliers at the yellow highlight marks.

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    2018 srw 3500

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