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The metal stops the rodents from chewing through the flap facepate of the non return valve and protects your plumbing system from rats and other rodents from entering buildings.\u003c\/p\u003e\n\u003cp\u003eFlap Valves are installed on a pipe and allow water (and or solids if a soil or drainage pipe) to flow through the pipe as usual, but prevent anything from flowing back in, like flood water, rats or debris. The pressure of the water flowing through the pipe will open the valve, they automatically close when there is nothing flowing through the pipe.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhere Can flap valves be installed? \u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThese flap valves are designed to be installed at the end of horizontal sewage pipes entering collection wells, cesspits or on drainage pipes leading storm water to soakaways or rivers. 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Slips onto the end of pipes. Effective Anti-flood Valve and Rat Barrier Drain Protection.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is a Flap Valve?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eFlap Valves are innovative devices used to prevent flooding caused by the back flow of storm water and sewage. Backflow can be caused by intense rain, thaw or floods. The valves prevent backflow into residential and commercial premises via the drain systems, toilets or sewers. Effectively protecting rooms on lower levels against flooding caused by backflow of storm water and sewerage.\u003c\/p\u003e\n\u003cp\u003eWhere the Flap Valve has a metal Faceplates (like these), they are also an effective rat barrier to your drainage system. The metal stops the rodents from chewing through the flap facepate of the non return valve and protects your plumbing system from rats and other rodents from entering buildings.\u003c\/p\u003e\n\u003cp\u003eFlap Valves are installed on a pipe and allow water (and or solids if a soil or drainage pipe) to flow through the pipe as usual, but prevent anything from flowing back in, like flood water, rats or debris. The pressure of the water flowing through the pipe will open the valve, they automatically close when there is nothing flowing through the pipe.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhere Can flap valves be installed? \u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThese flap valves are designed to be installed at the end of horizontal sewage pipes entering collection wells, cesspits or on drainage pipes leading storm water to soakaways or rivers. They are sometimes referred to as Outfall Flap Valves.\u003c\/p\u003e\n\u003cp\u003eAvailable to fit either 110mm (4 inch) or 160mm (6\") pipes.\u003c\/p\u003e\n\u003cp\u003eEasy to install. The Non-Return Valve simply slips on to the end of the pipe. The O-ring within the Valve effectively jams the Flap Valve onto the pipe.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTechnical \u003c\/strong\u003e\u003cb\u003eInformation\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eThis flap valve is equipped with a chromium-nickel cover (A) protecting the flap and gasket. Additionally a chromium-nickel cover of the lever (B) has been designed into the Non-Return Valve to protect against rodents, atmospheric and the environmental conditions (eg. river flow). Flap valves have a rubber O-ring on the inside which ensures a tight fit of the valve to the pipe and effectively keeping the valve in place.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSuitable for water, drainage or soil pipes\u003c\/li\u003e\n\u003cli\u003eFits either 110mm or 160mm Pipes\u003c\/li\u003e\n\u003cli\u003eFits over the outside of the pipe\u003c\/li\u003e\n\u003cli\u003eInstalled at the end of the pipe\u003c\/li\u003e\n\u003cli\u003eOperation fully self-activating\u003c\/li\u003e\n\u003cli\u003ePlastic body: high quality polypropylene with increased UV resistance. The material is harmless to the environment and can withstand temperatures up to 95°C as well as resist aggressive chemicals.\u003c\/li\u003e\n\u003cli\u003eStainless chromium-nickel stainless steel Faceplate\u003c\/li\u003e\n\u003cli\u003eConforms to EN-13564-1:2004\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eOther Versions\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFlap Valves for Agricultural Land Drains are also available, fitting 72-100mm pipes,\u003c\/li\u003e\n\u003cli\u003eInline Backflow Valves Valves for 50mm waste pipes,\u003c\/li\u003e\n\u003cli\u003e110mm and 160mm Inline Backflow Valves for Horizontal pipes,\u003c\/li\u003e\n\u003cli\u003e110mm and 160mm Inline Backflow Valves for Vertical Pipes.\u003c\/li\u003e\n\u003c\/ul\u003e"}

Flap Valve Anti Flood Non Return Valve

£39.99
Maximum quantity available reached.

Non Return Valves for drainage and water pipes, available in two sizes 110mm and 160mm. Slips onto the end of pipes. Effective Anti-flood Valve and Rat Barrier Drain Protection.

What is a Flap Valve?

Flap Valves are innovative devices used to prevent flooding caused by the back flow of storm water and sewage. Backflow can be caused by intense rain, thaw or floods. The valves prevent backflow into residential and commercial premises via the drain systems, toilets or sewers. Effectively protecting rooms on lower levels against flooding caused by backflow of storm water and sewerage.

Where the Flap Valve has a metal Faceplates (like these), they are also an effective rat barrier to your drainage system. The metal stops the rodents from chewing through the flap facepate of the non return valve and protects your plumbing system from rats and other rodents from entering buildings.

Flap Valves are installed on a pipe and allow water (and or solids if a soil or drainage pipe) to flow through the pipe as usual, but prevent anything from flowing back in, like flood water, rats or debris. The pressure of the water flowing through the pipe will open the valve, they automatically close when there is nothing flowing through the pipe.

Where Can flap valves be installed? 

These flap valves are designed to be installed at the end of horizontal sewage pipes entering collection wells, cesspits or on drainage pipes leading storm water to soakaways or rivers. They are sometimes referred to as Outfall Flap Valves.

Available to fit either 110mm (4 inch) or 160mm (6") pipes.

Easy to install. The Non-Return Valve simply slips on to the end of the pipe. The O-ring within the Valve effectively jams the Flap Valve onto the pipe.

Technical Information

This flap valve is equipped with a chromium-nickel cover (A) protecting the flap and gasket. Additionally a chromium-nickel cover of the lever (B) has been designed into the Non-Return Valve to protect against rodents, atmospheric and the environmental conditions (eg. river flow). Flap valves have a rubber O-ring on the inside which ensures a tight fit of the valve to the pipe and effectively keeping the valve in place.

  • Suitable for water, drainage or soil pipes
  • Fits either 110mm or 160mm Pipes
  • Fits over the outside of the pipe
  • Installed at the end of the pipe
  • Operation fully self-activating
  • Plastic body: high quality polypropylene with increased UV resistance. The material is harmless to the environment and can withstand temperatures up to 95°C as well as resist aggressive chemicals.
  • Stainless chromium-nickel stainless steel Faceplate
  • Conforms to EN-13564-1:2004

Other Versions

  • Flap Valves for Agricultural Land Drains are also available, fitting 72-100mm pipes,
  • Inline Backflow Valves Valves for 50mm waste pipes,
  • 110mm and 160mm Inline Backflow Valves for Horizontal pipes,
  • 110mm and 160mm Inline Backflow Valves for Vertical Pipes.
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Occasionally there are delays we shall not be liable for any direct or indirect losses, costs, damages or expenses incurred by you or any other person for any delays in delivery.

We are an environment centric business and as such we try to minimise our waste. Our packaging is usually recycled and we make efficient use of packaging to minimise wastage.