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FlexStor Vac Attach

Call 1-800-557-4689 to Order

Our customer service team will help place your order with your nearest dealer. Dealership and direct sale pricing may vary. If a dealer is not in your area, please ask us for a freight quote to your location.

Customer Service Hours: Monday - Friday, 8 am to 5 pm CST

Manufactured in the USA

The FlexStor Vac Attach is an attachment for a grain vac that offers a solution for emptying grain bags. Because of its framed structure equipped with hydraulic driven gathering augers and flexible suction tube for moving grain to the grain vac rubber input hose, the FlexStor Vac Attach simplifies the labor required when emptying grain bags.


  • Simplifies the labor required when emptying grain bags.
  • The tractor steers the gathering augers to keep them centered inside the grain bag during operation.
  • Its inherent weight acts as a counterbalance for lifting/winding the grain bag.

    • Versatile enough to connect alongside the grain vac or directly behind it.
    • Hydraulic powered gathering augers & bag winders are used to move all the grain to a central suction inlet inside the grain bag that is connected to the grain vac via flexible suction tubing.
    • As the Vac Attach moves rearward into the grain bag, the grain vac is pulled forward as needed by the tractor powering it to stay in close proximity.
    • Height control, counterbalance and hydraulic power is provided by connection to a smaller tractor, acting as a prime mover for the FlexStor Vac Attach.
    • Use of a suitable length suction tube between the two pieces of equipment allows the operator to only move the grain vac forward when changing trucks.
    • The tractor 3 point hitch allows the operator to raise and lower the gathering augers for transport or positioning inside the grain bag. A towbar hitch can also be used when a 3 point hitch is not available.
    • The grain bag is wound onto steel tubular cores that can easily be removed by one person.

    Patent Pending

      We try our best to ship orders in the timeliest manner possible. Each product may have a different level of manufacturing demand and timeframe for shipment.

      Shipping Rates

      We offer calculated shipping rates during the checkout process. USPS, UPS & FedEx services are available if the product ordered qualifies for those options.

      Order Processing

      Business Days: Monday-Thursday.
      Holidays, Fridays, Saturdays and Sundays are not included in processing days.

      If you have any questions or concerns about your order's status, please email us at to discuss.

      International Orders

      Customers are responsible for any brokerage fees incurred on shipping. Sioux Steel Company cannot calculate these fees.


      Products on this website do not qualify for returns. We understand this may cause you concern....

      We are here to help!

      Our customer service team is available Monday-Friday, 8am to 5pm CST to discuss the parts in question PRIOR to placing your order.

      Call us toll free at 1-800-557-4689 to talk and confirm your parts needed.

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      Dealer Locator
      We distribute products through local dealerships in your area. Prices and product availability may vary between dealerships.

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      NOTE: All product specifications are subject to change or improvement without notice. We reserve the right to change product pricing at any time without further notice. Pricing may differ at the time of purchase.

      Contact Sioux Steel by emailing or by calling our customer service specialists at 1-800-557-4689 for additional information.

      SIOUX STEEL COMPANY FOUNDATION: 2% of the total sales dollars from this website are donated to the Leukemia and Lymphoma Society. Beating cancer is in our blood.

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