The hirer of a standpipe is required to prevent backflow in accordance with the requirements of the Plumbing Code of Australia (PCA) and AS/NZS3500.1, and Council’s policy on Backflow Prevention and Cross Connection Control.
Prevention may be in the form of a fixed air gap or a testable backflow prevention device (e.g. RPZD or DCV).
Fixed Air Gap
Proof of compliance must be provided by way of photographic evidence showing the fixed air gap being 2x the internal diameter of the fill pipe. See Standpipe Hire Agreement for full details.
Backflow Prevention Device
Where an air gap is not possible, the hirer must install a testable backflow prevention device on the vehicle or standpipe. This device must be registered and tested annually.
The applicant must submit a copy of the backflow prevention test and maintenance report, as issued by a certified backflow prevention plumber, with their application for standpipe hire.