Flap Valves

HDPE Flap Valves – designed to prevent backflow in drainage networks.

Product Details

Civilmart are able to offer a range of Flap Valves for Stormwater Applications.

These solutions are designed to act as a non-return valve (one-way valve) for stormwater infrastructure to prevent downstream water re-entering the upstream pipe network and potentially ‘backing up’ the system.

These devices are manufactured from High Density Polyethylene (HDPE) providing a lightweight, high-strength and corrosion resistant alternative to other materials

Flap Valves are generally available in three (3) typical mounting options:

  • Wall Mounted (i.e. affixed to a headwall or wall-type structure)
  • Spigot Mounted (i.e. affixed to a pipe end)
  • Flange Mounted (i.e. affixed to a pipe joint of a specific material / type)

These designs can incorporate various seal types to limit leakage between pipe and flap valve and assist with the creation of a watertight seal.

Generally Flap Valves are available to suit DN100 to DN600 pipe with custom options available upon request.

If your application is in a potentially aggressive environment or associated with other waste streams – such as sewer – please don’t hesitate to contact us to discuss options.

Product Features

HDPE Flap Valves are:

  • Lightweight
  • Available in wall, spigot or flange mounted profiles (with mounting kits)
  • Easy and quick installation or can be supplied pre-fitted (speak with your Civilmart specialist)
  • Robust and rigid construction
  • UV stable
  • Fully recyclable
  • Corrosion resistant
  • Little to no maintenance required
  • Designed with suitable Opening Pressure in mind (low cracking head)
  • Available in DN100 to DN600 pipe – for custom options please don’t hesitate to contact
  • We can make larger size flap valves (above 600mm)
  • 100 year design life

Industry Compliance

  • Selection and usage of Flap Valves is typically via a project by project requirement
  • Please check project specific requirements and potential Flap Valve solution with your engineer and certifier before ordering

Sales Region

This product is available throughout Australia. Please don’t hesitate to contact your local Civilmart specialist for more information.