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What is the difference between Full Retention and Bypass units?

April 26, 2017bypass retention units

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What is the difference between Full Retention and Bypass units?

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Full Retention Separators treat the full flow that can be delivered by the drainage system, (normally equivalent to a flow generated by a rainfall intensity of 50mm/hr). Bypass Separators treat all flows up to 5mm/hr. This covers up to 99% of all rainfall events. Flows above this rate are allowed to bypass the separator.