From Between 90” & 135”


A large-size flowstop device is ideal for large openings, such as a Garage door, large windows, or entryways.

FlowStop is an inflatable anti-flood device that protects any size door from flooding.
From front door to garage door, size does not matter here, you will never have to drill, nail, strap, or combine devices to protect your house.

Supplied with a high-performance double-action pump, your flood barrier can be installed in 4min.

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SKU: FS-L Category:



  • Custom-made with a tailored width to fit any doors and windows.
  • The standard height is 31.5 inches, but it can also be customized.
  • The box includes a Flowstop device, a manual pump, and installation instructions.
  • Check our YouTube channel for our video tutorials.
  • Shipping costs in Europe are 90 €, and shipping costs in the USA are $180.
  • Average manufacturing and delivery time can be up to 4 weeks.

FlowStop is a custom-made inflatable anti-flood device that protects openings in your building from exterior flooding. Our devices are 100% watertight and created specifically to fit your openings. From front and garage doors to windows of any size, we offer flood protection to prevent costly disasters.

Flowstop devices are installed quickly, inflating within minutes, and require zero construction to the exterior of your property. Once a flooding incident has passed, our devices deflate quickly and are compact and lightweight for easy storage.

Features :

  • Quick & easy installation.
  • No work is required for the installation.
  • Inflatable in less than 5 minutes, depending on the width.
  • A flexible gasket perfectly matches your concrete, render, or natural stone finish and offers a perfectly watertight result.
  • custom-made to be compatible with any openings.
  • Compact, lightweight storage
  • Reusable hundreds of times over
  • 5-year warranty

Additional information

Weight 11 kg