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Differences Between 3‑Valve vs 5‑Valve Backflow Test Kits

Learn the key differences between 3-valve and 5-valve backflow test kits used for AS/NZS 2845.3 testing. This post explains how 5-valve kits offer enhanced control for pressure equalisation and air removal, helping technicians achieve more stable, accurate readings during RPZ relief valve tests across Australia and New Zealand.











