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Backflow Valves

The non-return (backflow) valves are intended for installation on horizontal sections of pipework in drainage catch pit both outside and inside buildings.

Increases in heavy rainfall events has made the occurrence of flooding from storm water drains more common.

They are backwater and flooding protection, protecting a building from backwater of the drainage system, operating automatically allowing free drainage of rain water according to the slope of a drain system channel but disallow 'backflow' of water, and are additionally equipped with a manually-operated flap closing lever. This lever is used during longer periods of absence of users or in cases when flaps are required to be closed.

  • reliable and maintenance-free,
  • effectively protect a building from unpleasant odors getting inside a building when drain and sewerage systems are not used for longer periods,
  • reduce the risk of rodents getting inside a building through drain and sewerage systems,and
  • made of materials of high resistance to aggressive substances
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  1. 110mm Harmer Backflow Valve - Double Flap
    110mm Harmer Backflow Valve - Double Flap
    Was £89.50 Sale Price £76.08
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    Estimated Delivery date is 14/05/2024
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  2. 110mm Harmer Backflow Valve  - Single Flap
    110mm Harmer Backflow Valve - Single Flap
    Was £53.68 Sale Price £45.63
    You Save 15%
    Estimated Delivery date is 14/05/2024
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  3. 160mm Harmer Backflow Valve - Double Flap
    160mm Harmer Backflow Valve - Double Flap
    Was £147.72 Sale Price £125.56
    You Save 15%
    Estimated Delivery date is 14/05/2024
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