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Under pressure tapping innovation


Under pressure tapping (UPT) is a unique technique using specialist equipment to typically provide connections to a live watermains without having to shut the supply down.


Normally, this is done by drilling a horizontal hole into the host pipe through a sluice vale that is attached by using a clamp around the host pipe or by welding a stub flange onto it.


Citycare Water recently innovated its UPT process by drilling  vertical holes into a suspended wastewater pipeline for the first time.


“The beauty of UPT is that it saves time and having to shut off existing mains to cut in a new connection. By doing this it doesn’t disturb the customer’s water supply,” says John Twentyman, Acting Citycare Water Auckland Regional Manager.


This latest job was carried out on the outskirts of Te Aroha for the Matamata Piako District Council. Citycare Water worked closely with Pipeline and Civil to establish two connections to the 400mm diameter wastewater pipe bridge that needed to be drained for a section of pipeline to be replaced.


Temporary scaffolding was used to construct a platform to enable the UPT machine to be hoisted and bolted in place, John says.


The two new connections allowed the wastewater to be pumped from these supply holes to a downstream manhole where the wastewater continued on its way to the treatment plant.


This job was a great example of collaboration to find an out-of-the-box solution for a challenging problem which led to a great result for the client, he says.


Citycare Water is one of only a few companies in New Zealand with the capability and specialist equipment to undertake such UPT work.


Congratulations to Graham Aaoke from Citycare Water’s Pump team and Fisiihoi Mone from our Construction crew who carried out this intricate job and received praise for their work.

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