The twin flap backwater valve Staufix SWA can be used as central backwater protection according to EN 13564 type 2. It is suitable for showers, sinks and washing machines that are located in the basement. Cellar steps up to 5 m² can also be drained via the backwater valve, if penetration of rainwater into the building during the backwater phase is prevented by a thresher or similar solutions.

Normally, the waste water flows from the building through the backwater valve into the sewer. Backwater from the sewer is prevented from entering the building by the backwater flaps. One flap can be also locked using a manual emergency closure during a backwater incident or longer periods of absence. The second flap serves additional safety.

The backwater valve Staufix SWA is available as an installation kit for the concrete slab and is especially well suited for new buildings. The version for exposed drainage pipes is a good option for renovation projects and can be fitted quickly and easily.

• Double protection
  Two freely suspended flaps ensure safe backwater protection. The backwater valve can also be locked with an emergency closure in case of longer periods of absence.
  
  
• Flexible installation
  More flexibility and reliability when installed in concrete slabs, new extension system with optional center located sealing flange for connection to waterproofing membranes.
  
  
• Removable inlet- and outlet connections
  Flange/spigot for customized connections. Variable inlet and outlet sizes available in diameter Ø 110, 125, 160 and also in Ø 200 mm.
  
  
• Drain body with only 9 mm gradient
  This allows it to be retrofitted in existing drain pipes.
  
  
• Fast and simple maintenance
  The standard quick-release closures made of polymer allow the backwater valves to be serviced easily and quickly without tools.
  
  
• Easy retrofitting
  The backwater valve Staufix SWA can be retrofitted with the conversion kits for Staufix FKA and Pumpfix F – even in its installed state.