Flood Defence - Non-Return Valves
We supply and install a range of simple and cost-effective non-return valves that are fully automatic with single or double flaps which prevent any backflow of sewage into a property.

As surcharge occurs, the float rises closing the valve which isolates the property from the sewer. The valve is forced shut all the time that the sewer is surcharging but still allowing normal flow from the property. The valve automatically opens when the surcharge has passed.
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