Backflow testing is a vital part of ensuring the backflow prevention devices are in good working order. The seals in the devices need to be watertight, some devices also contain spring mechanism parts which can lose their tension over periods of time causing the valve to fail. It is for this reason experienced plumbers need to annually test the devices.

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It is a requirement that a qualified backflow plumber conducts annual backflow testing, with the maximum period being 12 months between each test. Test reports are then sent to the relevant authorities as part of the compliance requirements. Backflow plumbers are required to ensure their backflow device testing equipment is calibrated on a yearly basis to maintain consistency. 

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