Featherston’s water network is supplied by a transmission pipe from Waiohine water treatment plant. Where the pipeline crosses the Tauherenikau river, the section of pipe that is exposed is approximately 23m long. Of the exposed section, around 15m of pipe is concrete encased and the remaining 8m is made up of steel pipe. A break in the coupler on the exposed section was identified on the 3rd December 2021. The leak only became visible when the river level was low. The area of the pipe around the leak suggests this may have been leaking undetected for some time and not visible due to high river levels.

A contingency plan for this scenario has been refined and a repair plan had to be created. The fix identified is in two phases: the first to stabilise the existing pipe to ensure sustainable water supply in shot term, with a second to replace the pipe with fully sustainable system that will last, many years.

Article by: Brent Merritt – Business Development Manager – Hynds Water

Nova Siria Duofit Repair Couplers

Duo-Fit repair couplers are manufactured and supplied in two pieces with heavy duty seals, allowing for a “wrap around” repair and no pipe shut down.

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For help with installation see our Repair Guide

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