As Australia’s urban centres expand, many utility companies face a huge task: replacing or augmenting underground water and wastewater pipelines.
Rather than digging open trenches through suburbs or under roads, engineers often turn to trenchless methods such as slip-lining or cased crossings – approaches that minimise disruption to communities.
But slip-lining only works if the carrier pipe is carefully installed inside the casing. Without proper support and spacing, the pipe can be damaged during the installation process, which may cause issues especially over the long life expected of PE networks.
As demand for these durable, cost-effective and corrosion-resistant pipelines grow, one Australian-born company is quietly becoming indispensable to the water industry: kwik-ZIP.
This is why kwik-ZIP spacers and centralisers are a small but critical investment in long-term water infrastructure.
Headquartered in Western Australia but with a worldwide customer base, the company manufactures non-corroding, non-metallic casing spacers and centralisers designed specifically for pipe-in-pipe applications including slip-lining, cased crossings, and other pipeline installation methods.
The kwik-ZIP product range, including the HD, HDX, and HDXT series, covers pipes from small diameters (about 100mm) to heavy-weight carrier pipes in excess of 1600mm OD. The spacers are moulded in a high-performance engineered thermoplastic blend, offering excellent chemical resistance, abrasion resistance, low friction, and resistance to corrosion.
All kwik-ZIP spacers have been successfully appraised against the Water Services Association of Australia’s product specification for casing spacers (WSA PS-324). This standard covers casing spacers used to facilitate the insertion and protection of carrier pipes when installed inside encasement pipes. Additionally, all products are also certified by the Australian Water Quality Centre for use in contact with drinking water. These features also make the products suitable for potable water projects.
Its products are also approved for use within many utilities’ infrastructure, including Melbourne Retail Water Association, South-East Queensland’s Infrastructure and Materials list, Sydney Water and the WA Water Corporation.
Because the spacers are non-metallic and inert, they won’t corrode or degrade, unlike metal spacers which risk transferring corrosion.
In terms of performance, kwik-ZIP spacers distribute the pipe’s weight across multiple runners, reducing point loading. This load-sharing suspension system cuts down on wear and stress, minimises the risk of pipe deformation or damage during insertion, and helps isolate the carrier pipe from vibrations or movements in the outer casing. kwik-ZIP’s spacers and centralisers have already proven themselves on major water infrastructure projects across Australia and the rest of the world, such as Water Corporation’s Alkimos seawater desalination plant project in WA.
When it comes to new water infrastructure, choosing the right spacer and centraliser system can determine whether a pipeline endures as intended, or succumbs early to wear, corrosion or misalignment. Installing a new main isn’t just about putting pipe in the ground. It’s about protecting that asset for decades – and kwik-ZIP helps make that protection real. U
