Buffalo 4 Inch (110mm) Water & Rodent Non Return Valve


Volume Unit Prices (excluding VAT)
1-4 5-10 11-25 26-50
£45.00 £40.00 £37.50 £35.00

Download Product Specification


  • 4” / 110mm non return valve fits clay and plastic pipes
  • New Full Stainless Steel Face and Flap Version Available Here
  • Single flap valve protects from flooding in drainage system. One way valve allows foul water to leave the property but automatically closes stopping backflow in flood events.
  • Simple to install into existing manhole, end of pipe, inspection chamber or septic tank. Easy push fit into the drain pipe, no additional equipment required.
  • Prevents foul water flowing back from the drainage system, stopping the property from flooding from the inside via toilets, plug holes and waste pipes.

150mm / 6 Inch Valve AVAILABLE HERE

WRc Tested and Certified


What does the Universal Fit WAR Non-Return Valve do?

  • Stops backflow of effluent into properties, businesses and homes during flooding. One way valve allows foul water to leave your home, but automatically closes to prevent backflow from drains in the a flood event. Will be used extensively in properties on flood plains.
  • Stops rats, frogs, snakes and other vermin from entering homes, businesses and other properties.
  • Prevents noxious fumes from entering properties. Ideally suited to the food and catering sector.
  • The flap has an inbuilt stainless steel plate to stop rodents biting through, providing efficient pest control. Insert the Buffalo valve to protect drains and block rats.
  • A lockable flap allows you to close down entry pipes to inspection chambers to allow essential maintenance to be carried out.
  • The valve is completely re-usable when used for maintenance purposes.  The valve can be inserted while work is carried out then removed and used again.
  • The valve can open on a 45 degree bend due to its unique flap design.
  • The unique flap design also means the flap doesn’t catch on the chamber walls – which could restrict its movement and operation.
  • Unique funnel shaped body design means the flow of water is increased when passing through the unit; reducing blockages
  • Fits both Clay and Plastic 110mm or 4″ pipes.
  • 5 Year Guarantee


How the Buffalo Water & Rat Non-Return Valve works

How to Install the Buffalo Water & Rat Non-Return Valve

Product Specification

Download SpecificationDownload Installation Instructions 

Please Note:

  • ‘Universal’ wording refers to the valve able to fit both clay and plastic.
  • The valve fits all in line straight inlets to all inspection chamber bases.
  • It fits 45 and 90 degree inlets on 450mm diameter chamber bases.
  • Not suitable for some 45 and 90 degree inlets on smaller 300mm diameter (or less) chamber bases. Only the straight inlets on smaller chamber bases. This is due to the tight angled chamber walls restricting installation and operation.
  • Forcing the product may cause damage.
  • All the of the valve’s rubber fins must be in the pipe. If any of the rubber fins are exposed, then the product is not fully inserted and not installed correctly.

Community Design Registration No. 002723924

Patent Pending No. GB1510974.7

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