In recent years, the demand for reduced pressure zone (RP2) valves in the UK has rapidly increased, driven by regulatory changes and an acknowledgment of their importance for public health by preventing backflow.Backflow is a generic term meaning "flow in the opposite direction of its regular flow".Regulations state that every UK water system should contain devices to prevent backflow from any appliance, fitting or process. Additional protection is required where there is a risk of backflow between separately occupied premises.
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