Backflow Prevention Sydney — Sydney Water Accredited Testing & Install

Sydney Water's Trade Waste & Backflow team requires every commercial, industrial and medium/high-hazard site to test their backflow prevention device annually under the Plumbing & Drainage Act 2011 (NSW) and AS 2845.3. Miss the deadline and you face a $750 reminder fee plus potential prosecution. Our testers are Sydney Water accredited and lodge your annual certificate directly with the Sydney Water portal within 24 hours of testing — you don't touch paperwork.

Annual test is $189 for a single device (RPZD, DCV, DCDA or single-check). Properties with multiple devices: 2nd device $145, 3rd+ $99 each. Test takes 30–45 minutes per device, with no water shutdown for most low-hazard valves and 15-min isolation for RPZDs. We bring calibrated Watts/Wilkins test kits with NATA traceability certificates current to 12 months — required for the certificate to be valid.

New install required? Most Sydney commercial properties need at minimum a DCV (dual check valve) at the boundary — install from $385. Higher-hazard sites (medical, dental, food processing, chemical, irrigation with fertigation) need an RPZD (reduced pressure zone device) — install from $1,450 including pit, isolation valves, drain and first certification. We size correctly to AS 2845.1 hazard rating so you don't pay for over-spec.

Repairs to failed devices done same-visit where possible — typical fault is a fouled first check valve or a perished diaphragm, parts from $245 + labour. If the device is beyond economic repair (typically 15+ years old) we'll quote replacement on the spot. Servicing Sydney metro, Central Coast and Newcastle commercial sites — call 0488 822 794.

Whether you searched for sydney water accredited backflow, rpz device install sydney or annual backflow certificate, Tradetek Solutions handles the job end to end across Sydney, the Central Coast and Newcastle. Call 0488 822 794 to book a licensed team today.