Backflow in sewage, stormwater, and industrial systems is more than an inconvenience. It can damage infrastructure, pollute water sources, and cause costly shutdowns. To avoid this, operators need a solution that runs continuously, resists corrosion, and demands little to no maintenance. The Proco Style 730 Rubber Duckbill Check Valve delivers exactly that, using a simple yet highly effective design that prevents reverse flow without moving parts or external power.

A Century-Old Concept Built for Today

The duckbill valve design has been trusted in waterworks for over 100 years. Its flexible sleeve opens with forward flow and closes instantly to block backflow. With no discs, hinges, or springs, it avoids the most common points of failure found in metal check valves.

The demand for this design is not slowing. The global rubber duckbill check valves market was valued at approximately USD 120 million in 2024 and is projected to grow at a 5.2% CAGR from 2026 to 2033, with rising use in wastewater management, irrigation, and industrial applications.

What makes the Proco Style 730 stand out:

  • Handles raw sewage, sludge, and abrasive slurries
  • Fabric reinforced sleeve ensures long service life
  • Solids pass freely without clogging
  • Tight seal maintained even around trapped debris
  • Silent operation with minimal pressure loss

From Sewage Plants to Marine Outfalls

The Proco 730 is versatile and suitable for both horizontal and vertical installations. It is widely adopted in:

  • Sewage treatment plants for controlling back pressure and preventing backflow
  • Stormwater systems that face corrosive and abrasive conditions
  • Marine outfall pipelines preventing seawater intrusion
  • Industrial effluent piping managing sludges and slurries

These real-world applications are the reason demand for duckbill valves is growing worldwide. The plastic duckbill valve market, which includes rubber variants, was valued at around USD 500 million in 2023 and is projected to reach USD 800 million by 2032, expanding at a 5.5% CAGR. Much of this growth is linked to rising investments in urban infrastructure and stricter water safety regulations that favour simple, low-maintenance solutions like the Proco Style 730.

Rubber Duckbill vs Metal Check Valves

Conventional check valves rely on mechanical parts that corrode, jam, or wear out. Duckbill valves eliminate these risks with a simple, reinforced rubber sleeve that adapts to flow conditions.

Feature Metal Check Valves Rubber Duckbill Check Valves
Moving Parts Multiple, prone to wear None, reducing maintenance needs
Corrosion Resistance Dependent on coatings or alloys Inherent with reinforced elastomer
Backflow Sealing Hinges and discs may leak Flexible sleeve seals even around solids
Power Requirement May need actuation None, powered by flow itself
Maintenance Costs Higher across service life Minimal, reliable throughout lifespan

This is why the global backflow preventer valves market, which includes duckbill designs, is projected to grow from USD 2.1 billion in 2023 to USD 3.8 billion by 2032 at a 6.5% CAGR. Regulations for water safety and contamination prevention are accelerating adoption worldwide.

Global Hotspots for Duckbill Valve Demand

The Asia Pacific region is a major driver of demand, with countries such as China, India, and Japan investing heavily in urban infrastructure and large-scale water treatment projects. In North America, the rubber duckbill valve market was valued at USD 0.5 billion in 2022 and is projected to reach USD 0.8 billion by 2030, growing at a 6.0% CAGR as municipalities and industries strengthen water safety programs.

The Middle East is also witnessing increased adoption, driven by expanding sewage treatment plants, flood protection systems, and investments in sustainable water management. With urban growth and climate challenges intensifying, solutions like the Proco Style 730 are proving essential for reliable, maintenance-free backflow prevention.

This global momentum underlines why Proco’s duckbill valves are trusted across municipal, marine, and industrial networks, and why they are set to play a central role in infrastructure projects for decades to come.

Why We Are Showcasing Proco At WETEX

At this year’s WETEX exhibition, from Dutco our team will highlight the Proco Style 730 Rubber Duckbill Check Valve, chosen for its global reputation and proven reliability. 

With over 30 years of expertise in check valves and expansion joints, Proco has become a trusted name in chemical, petrochemical, industrial, and municipal water sectors. Their duckbill valves deliver maintenance-free backflow prevention, making them the preferred choice for critical infrastructure worldwide.

Mark your calendar so that you don’t miss the event:

  Dubai World Trade Centre

  30 Sept to 2 Oct

  Stand No.: 7-H5