Does anybody know what this tank is for under the semi truck trailer?

I’ve always wondered that tank is for all these years growing up and looking at semi trucks

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12 Answers

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  • Anonymous
    5 months ago

    fuel for the compressor of the freezer on the trailer, called a 'reefer' trailer ...................

  • 5 months ago

    Fuel for the air conditioner of the trailer. Some products like wine and food need to be temperature controllee.

  • 5 months ago

    Reefer.........................

  • 5 months ago

    It might be propane to run the fridge if the trailer is a reefer trailer.

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  • ?
    Lv 7
    5 months ago

    Doubtless a fuel tank for the trailer refrigeration unit. They have a tank separate from the tractor, so the refrigerator continues to run when the tractor is switched off or disconnected.

  • 5 months ago

    looks like an air tank

  • 5 months ago

    Fuel tank for the refrigeration unit.

  • Phil M
    Lv 7
    5 months ago

    As already stated, it is a diesel fuel tank for refrigeration unit.

  • Anonymous
    5 months ago

    It’s for the reefer unit that keep the trailer cool when has perishable food in it

  • Anonymous
    5 months ago

    Probably air.

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