About St Marys Water Recycling Plant Project
St Marys Water Recycling Plant is one of 30 wastewater treatment and water recycling plants in greater Sydney, NSW. It services 160,000 people and recycles water for on-site re-use, irrigation of the local golf course and environmental flows.
St Marys Advanced Water Recycling Plant is one of the largest water recycling plants in Australia. The upgrade of the St Marys Water Recycling Plant Project commenced in 2019.
Pipe Infrastructure Capabilities
St Marys Wastewater Recycling Plant treats 33.5 million litres per day through three main treatment processes. Allmach supplied pipes, fittings and valves for the various services needed to operate the treatment plant. Allmach’s SurePress SS316 press-fit piping system, UNiPLAS Sch80 piping system, and Stream PE100 piping system were utilised for the water, compressed air, and chemical dosing pipe runs.
UNiPLAS pipe and fittings are manufactured from Sch80 uPVC, giving them greater strength and flexibility, are UV stabilised, corrosion and chemical resistant, lightweight and non-toxic. Stream PE100 is a robust and flexible polyethylene (PE) pipe and fittings range suitable for use in recycled and potable water and faster installation. The range includes electrofusion fittings.
Challenges and Solutions
The St Marys Wastewater Treatment Facility project had a strict project schedule, and another key challenge was the limited space in the processing and treatment areas. The installer used the SurePress system because it is corrosion-proof, leak-proof, and has wash-down properties. In addition, the pipes are easier to install in confined spaces with no welding and hot work permits required. The QA checks were easier due to the press-check sleeve film and leak path O-rings. This enables easy identification of any unpressed fittings. SurePress piping system made the installation faster, easier, and safer to install, saving significant time and money.
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