Self-Weighted Bubble Tubing®
Water Injection Dredging Bubble Curtains
Bubble Curtains are an effective companion technology to water injection dredging operations which are widely used to maintain navigable depths in ports, marinas, berths and channels by fluidising accumulated sediments and flushing them into the water column.

The rising plume of microbubbles created by a Bubble Curtain generates vertical flow that keeps suspended particles moving, steers them away from critical areas and reduces re-settling at quay walls, berths and lock mouths. The result is higher dredging efficiency, fewer maintenance returns and better long-term navigability.
Bubble Curtains are strategically placed in conjunction with water injection dredging equipment to maintain suspension, and can be tuned to local tidal windows to promote flushing out of the system.
- Self-weighted Bubble Tubing® is simple to deploy from quay or vessel and can be configured for temporary campaigns or semi-permanent operation.
- ISO 9001-engineered diffuser technology provides low energy demand, self-cleaning perforations and durability for repeated use in saline, high-sediment environments, safe for aquatic fauna and backed by a 5-year warranty.
- Bubble Curtains connect to standard compressors, with silent and renewable-powered options for longer-term, cost-effective running that does not impede navigation.
- For long-term installations targeting reduction of siltation in locks and around critical infrastructure, see our Abstraction and Asset Protection Bubble Curtains.
Key Benefits
Supporting efficient dredging and reducing silt accretion in ports and harbours
Improves dredging efficiency
Keeps sediments in suspension during operations
Reduces silt accretion
Prevents rapid re-deposition in berths, marinas and channels
Protects critical areas
Limits siltation around quay walls, locks and intake zones
Flexible layouts
Linear, arc or enclosing arrangements tailored to dredging patterns
Does not obstruct navigation
Permeable barrier safe for vessels and aquatic life
Cost and carbon efficiencies
Extends dredging intervals, reducing energy use and repeated operations
Every Bubble Curtain is designed around site conditions. Key design considerations include:
Scope of project | Curtain length, water depth, flows, tidal range, bathymetry, and access |
Layout | Geometry (linear, arc, enclosure) |
Weighted options | Additional anchoring and moorings to suit substrate and flow conditions |
Compressor | We will provide specification including oil-free, energy-optimised units with low noise options |
Maintenance | Self-purging perforations minimise fouling |
Warranty | Supplied with a 5-year manufacturing warranty |