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The Flapstopper™ Drain Closure Valve

CIRIA C736 Compliant. Automated Pollution & Firewater Containment

The Flapstopper™ pollution and firewater drain closure device is a rapid closure, automated spill containment system designed to stop the flow of pollutants escaping site by fully sealing off drainage networks. Engineered to protect your site from environmental disasters.

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Flapstopper™ Inlet Drain Closure Valve

Designed for inlet and headwall pipe mounting as part of your drainage plan.

Flapstopper™ Outlet Drain Closure Valve

Designed for outlet pipe mounting and acts as a spill containment chamber.

Flapstopper™ Flow Diversion Valve

Designed for flow control and diversion as part of your drainage plan.

Flapstopper™ CSO Containment Valve

Designed for hold back and control the flow of sewage in your network.

Why Choose the Flapstopper™?

The Flapstopper™ is designed and engineered for automated, rapid full drain closure, protecting your industrial site from tertiary pollution and firewater run-off spills through your drainage network. Backed with over 20 years of successful deployments across the UK and Europe, Environmental Innovations bring decades of technical expertise to every unique project.

  • Reliable Operation Whilst Fully Submerged In Water

    Overcome the risk of valve failure with our purpose engineered inlet and outlet pipe valve variants.

  • Automated Full Drain Closure Under 5 Seconds

    Rapid drain shut-off in seconds, protecting sites from polluted surface water run-off.

  • Cyber-Secure & Fail-Safe System

    A standalone non PLC system for independent operation and reliable remote activation options

  • Secure Toggle Lock & Manual Override Options

    When activated, the valve remains mechanically locked. Options to include manual override

  • No Mains Power Required In Chamber

    Pneumatically driven valve, designed for ATEX zoned areas and minimal civils costs.

  • Low Power Consumption for Solar / Mains Operation

    Low carbon and efficient drain closure system, compared to power hungry hydraulic and electronic valves.

Drain Closure Valve Comparison

Flapstopper™ Valves

  • Shuts-off Drains under 5 Seconds
  • Completely Stops the Flow
  • Intrinsically Safe in ATEX zones
  • Driven by Pneumatic Pistons
  • SS 304/316 for Hazardous Chemicals
  • Full Operation Whilst Submerged
  • Low Power Consumption
  • Designed for emergency site pollution and firewater protection

Hydraulic Valves

  • Longer Drain Shut-Off Time
  • Cannot be Submerged as Standard
  • Prone to Leaking Hydraulic Fluid
  • High Power Consumption
  • Designed for larger applications
  • Temperature Sensitivity
  • High Maintenance Costs
  • Expensive & Complex Setup
  • Expensive Civils Works

Electronic Valves

  • High Precision Flow Control
  • Mains Power Operation Only
  • Cannot be Submerged in Water
  • Not Designed for ATEX Zones
  • Requires Mains Power in Chamber
  • Overheating Motor Risk
  • Power Depedency
  • Slower Response Speed
  • Higher Intial Purchase Cost

Penstock Valves

  • Flow Control Only
  • Allows Pollutants to Escape Site
  • Not Designed for Containment
  • Slow & Manual Operation
  • Designed for Flood & Waterways
  • Prone to Debris Jams
  • Heavy Weight
  • Expensive & Hard to Install
  • Relies On Keys & Staff Operation

Tailored Environmental Support Service

Custom CAD Design Packages. Expert Consultative Advice. Pollution Risk Mapping

At Environmental Innovations, we offer expert support and guidance from concept design to deployment, supporting customers in identifying pollution high-risk hotspots to delivering reliable, effective and tailored pollution and firewater containment solutions that meet the current environmental legislations and standards, including CIRIA C736.

On-Site Drainage Assessments and Guidance

Flapstopper™ Valve Servicing and Sign-off

Custom Computer Aided Design Packages

Need more information?

Contact our technical team today to find your next solution.  Find out more information on our Linkedin page for latest updates.  For technical datasheets, consultative advice and to explore our larger portfolio, our technical team of engineers are happy to help. 

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