Duckbill Check Valve Supplier in Australia

Duckbill Check Valves – Backflow Prevention with Zero Moving Parts

Dewater Products supplies high-quality duckbill check valves designed for efficient one-way flow and minimal maintenance. Ideal for stormwater, sewage, outfalls, and marine or flood-prone environments, these valves seal tightly under back pressure while allowing smooth forward flow.

Available across Australia with fast delivery to Perth, Sydney, Melbourne, Brisbane, Adelaide, Hobart, Darwin, and regional areas.


How Duckbill Check Valves Work

Duckbill valves operate using a flexible rubber sleeve that opens under forward pressure and seals shut when back pressure is present. With no metal components or internal mechanisms, they are highly resistant to corrosion, clogging, or mechanical failure.

  • ✔ Opens with minimal forward pressure
  • ✔ Closes automatically when backflow pressure is present
  • ✔ No mechanical or moving parts to maintain
  • ✔ Self-clearing – debris is flushed through with flow

Key Advantages of Duckbill Valves

  • 100% rubber construction – corrosion and marine resistant
  • Silent operation – no slamming or hydraulic shock
  • Low head loss – ideal for gravity drainage systems
  • Long lifespan – highly flexible and fatigue resistant
  • Minimal maintenance – excellent for remote sites
  • Versatile mounting – slip-on, flanged, in-line, or wall-mounted

Common Applications

  • Stormwater discharge and tidal outfalls
  • Wastewater treatment plants
  • Flood-prone areas and marine environments
  • Irrigation canals and culverts
  • Underground drain and overflow systems

Sizes, Materials & Mounting Options

Dewater Duckbill Valves are manufactured from elastomeric rubber compounds, available in standard and custom sizes to suit your pipeline system.

  • Size range: DN50 to DN1800+
  • Mounting: Slip-on, flanged, inline, wall-mounted
  • Back pressure capability: Up to 15m head (varies by size)
  • Material: Natural rubber, EPDM, Neoprene or special compounds on request
  • Compatible with: concrete, steel, PVC, and HDPE pipe systems

How Do Duckbill Valves Compare to Other Check Valves?

Valve Type Backflow Prevention Moving Parts Ideal Use Case
Duckbill Check Valve Excellent None Stormwater, flood, outfall
Swing Check Valve Moderate Yes – swing disc General water and wastewater
Dual Plate Check Valve Moderate Yes – spring-loaded plates Inline flow systems

Frequently Asked Questions

Can Duckbill Valves be submerged in water?

Yes, they are designed for continuous submersion and resist marine growth and corrosion.

Do Duckbill Valves require maintenance?

No routine maintenance is needed. They are self-sealing and debris is flushed during flow.

Can they be installed on existing pipes?

Yes, slip-on or flanged duckbill valves can be retrofitted onto existing pipelines.

Are Duckbill Valves noisy in operation?

No – operation is silent with no moving or slamming metal components.

Need a Quote or Technical Advice?

We supply to councils, contractors, water authorities and civil projects across Australia. Whether you need a standard duckbill check valve or a custom configuration – we’re here to help.