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...
The non-return (backflow) valves are intended for installation on horizontal sections of pipework in drainage catch pit...
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  1. 200mm Harmer Backflow Valve - Single Flap
    200mm Harmer Backflow Valve - Single Flap
    £141.95 Special Price £144.79 £120.66
    You Save: (15%)
    Estimated Delivery date is 03/03/2021
  2. 200mm Harmer Backflow Valve - Double Flap
    200mm Harmer Backflow Valve - Double Flap
    £162.95 Special Price £166.21 £138.51
    You Save: (15%)
    Estimated Delivery date is 03/03/2021
  3. 160mm Harmer Backflow Valve - Single Flap
    160mm Harmer Backflow Valve - Single Flap
    £53.95 Special Price £55.03 £45.86
    You Save: (15%)
    Estimated Delivery date is 03/03/2021
  4. 160mm Harmer Backflow Valve - Double Flap
    160mm Harmer Backflow Valve - Double Flap
    £131.95 Special Price £134.59 £112.16
    You Save: (15%)
    Estimated Delivery date is 03/03/2021
  5. 110mm Harmer Backflow Valve  - Single Flap
    110mm Harmer Backflow Valve - Single Flap
    £47.95 Special Price £48.91 £40.76
    You Save: (15%)
    Estimated Delivery date is 03/03/2021
  6. 110mm Harmer Backflow Valve - Double Flap
    110mm Harmer Backflow Valve - Double Flap
    £79.95 Special Price £81.55 £67.96
    You Save: (15%)
    Estimated Delivery date is 03/03/2021

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