11/05/2026
Beneath one of Nelson’s busiest city streets sits a piece of infrastructure that’s been there for over a century.
On Bridge Street, a historic brick barrel stormwater line needed to be rehabilitated as part of a major city revitalisation project - but excavation wasn’t a viable option.
Replacing the asset would have meant significant disruption to traffic, businesses, and surrounding infrastructure. So instead, Nuflow Tasman delivered a trenchless solution designed to restore the pipe while preserving what was already there.
Using UV CIPP relining, the team rehabilitated approximately 250 metres of pipeline from within the existing structure. Prior to installation, extensive preparation was required - including CCTV inspections, dimensional checks, and the removal of around 20 tonnes of silt that had accumulated over decades.
The pipe itself presented additional complexity. Its original ovoid (egg-shaped) profile, combined with variations in diameter and multiple lateral connections, meant the installation had to be carefully staged and precisely controlled.
The relining process involved inserting a structural liner, inflating it to conform to the host pipe, and curing it using UV light to form a new internal pipe. This created a fully bonded, corrosion-resistant lining designed to restore structural integrity and maintain long-term hydraulic performance.
The result was a rehabilitated pipeline with a 100-year design life, delivered without major excavation and with minimal impact to the surrounding environment.
Projects like this highlight the role trenchless technology plays in modern infrastructure - not just in reducing disruption, but in enabling cities to upgrade essential systems while preserving existing assets.
👉 Fix once. Fix it right. Fix it with Nuflow.