Backwater Valve


An anti-flooding device protecting interiors from flooding caused by backflow of sewage. Such risk exists most frequently in sanitary drain systems connected to combined and other sewage systems.

The 50mm backwater valve is an ideal anti-flooding device for protecting interiors from flooding caused by backflow of wastewater in all drainage-related systems such as washing basins, kitchen sinks, shower bases and dishwashing machines.

For more information or to order please contact us using the following details:


Phone: (0404) 25570

  • The Backwater Valve is a passive flood protection solution
  • Operates fully automatically, no external power supply needed
  • Substitutes an inspection chamber, mounted at sewage system outlet from building
  • Resistant to effects chemicals and to hot wastewaters
  • Permits temporary blocking of wastewater flow (for overhaul works)
  • Maintains full flow capacity of the sewage system
  • Easy to operate and to maintain
  • 2 year manufacturer’s guarantee
  • The product is made of high-quality polypropylene (PP), a very durable material that is mechanically resistant as well as resistant to aggressive effects chemicals and to hot wastewaters.
  • Cover mounting bolts of chromium-nickel stainless steel of OH18N9 type.
  • Cover and flap gaskets made of EPDM rubber with improved resistance to weather factors and ageing.
  • Flow cut-off flap with chrome-nickel guard.


  • Connection diameter – 50mm
  • Weight – 0.15
  • Max operating temperature – 95°
  • Max operating pressure – 0,5 bar


CE Product fulfils the requirements of European Standards EN 13564-1:2002


  • Height – 121mm
  • Width – 78mm
  • Horizontal – for pipes below a 15 degree angle
  • Vertical – for pipes above a 15 degree angle


  • 2 year manufacturer’s guarantee.

The Backwater Valve uses the power of the flood water to close itself. Once waters subside, the Backwater Valve opens again.

Easy installation and virtually maintenance free.

Resistant to effects chemicals and to hot wastewater.

An ideal solution where it is impossible to assemble a backwater valve protecting the whole building, e.g. In an apartment block, public utility buildings, industrial premises, hospitals, hotels, offices – both in new systems and modernized ones.