Temporary, Reusable Flood Barriers

TrapBag® Home Defense Water Filled Barriers

Fast, Reusable Protection for Doors, Garages, and Storefronts

When heavy rain is in the forecast, you need protection you can deploy quickly.

TrapBag® Water-Filled Barriers are designed to help protect doorways, garages, storefronts, and facility entrances from rising water. Lightweight when empty and compact in storage, each unit fills with water to create a stable barrier capable of holding back up to 16 inches (0.4 m) of water when installed correctly.

No sand. No heavy equipment. No long setup.

Just practical flood protection you can use when it matters.

Is This the Right Flood Barrier for Your Property?

Water-Filled Barriers are a strong fit if you:

  • Want temporary protection for a doorway or garage
  • Need something reusable for seasonal storms
  • Want faster setup than sandbags
  • Are preparing for short-duration flooding

They are intended for static or low-velocity floodwater.

If you need engineered structural opening protection for repeated seasonal use, explore our Aluminum Plank System instead.

How the Water-Filled Barrier Works

Each barrier unit is 54 inches (1.37 m) long and includes:

  • Durable outer shell
  • Replaceable water bladders
  • External liner system
  • Built-in straps for connecting units

You position the barrier, insert the bladders, and fill them with water using a standard hose. The weight of the water anchors the system in place.

Multiple units can connect together to protect wider openings.

Installation Overview

You do not need formal training, but proper installation matters.

  • 1 Clean the Surface - Sweep debris and make sure areas where tape will stick are dry.
  • 2 Position the Barrier - Place it with the water-facing side toward the flood source and unfold fully.
  • 3 Insert the Bladders -Insert one bladder per cell, ensuring they lay flat without twists.
  • 4 Fill Evenly - Fill gradually, about 15% at a time across all cells. This keeps the system balanced and reduces stress on the shell.
  • 5 Seal the Liner - Carefully This step determines performance.
  • Tuck the liner at least 1 inch into the top
  • Clip it securely
  • Extend it onto the ground and up vertical surfaces
  • Tape all edges and overlaps   

If the liner is not sealed properly, water can pass through.

Why Property Owners Prefer This Over Sandbags

Compared to sandbags, this system:

  • Sets up much faster
  • Requires fewer people
  • Eliminates hauling and disposing of sand
  • Reduces cleanup after the storm 

When drained and stored properly, it can be reused for future events.

After the Storm

Once water recedes:

  • Drain the bladders completely
  • Remove the liner
  • Fold and store in a dry location 

When empty, the barrier is lightweight and easy to handle.

Frequently Asked Questions

Get Help Planning Your Coverage

If you are unsure how many units you need or whether your surface is suitable, our team can help you plan coverage for your doorway, garage, or storefront.

Speak With a Specialist