Sydney Water uses three levels: | Rating | Example | Device Required | |--------|---------|----------------| | Low | Residential house (no pool, irrigation, or rainwater tank connected to mains) | Single check valve (rare) | | Medium | Swimming pool, irrigation system, commercial kitchen | Double check valve (DCV) | | High | Chemical use, dairy, abattoir, factory | Reduced pressure zone device (RPZD) |
5–10 business days.
This usually happens due to:
Within 24 hours of installation, a (different from installer) must test the device and lodge a Form 2 with Sydney Water. backflow installation bringelly