Sewer lining first in Wessex Water project
Wessex Water has become the first company in the UK to deliver a pressure main liner to the new international standard for cured-in-place pipes under pressure.
The liner was installed inside a defective rising main at the company's Christchurch sewage treatment works near Bournemouth.
Critical sewers engineer Nathan Hand said: "Wessex Water has been lining gravity sewers since 1984.
"What was different here was putting a liner in a pressure main, so it had to be able to handle internal pressures from the pumps.
"This meant the design and materials were very different, with a glass fibre woven into the felt to strengthen it and a special blend of resin used."
Extensive collaboration was required to overcome some tough challenges and complete the scheme last month.
Paul Musselwhite, Wessex Water's multi-functional general foreman, explained: "What made this scheme unique was that all work was undertaken in an active sewage treatment works.
"It soon became apparent that an easy fix couldn't be undertaken due to the close proximity of a storm settlement tank.
"Our R&M waste department came up with a solution to overland the defective pumping main to keep the local network in operation. This also allowed time for the in-house rehab team to design one of the first pressurised liners to be installed.
"Both excavations were completed in very challenging ground conditions, and we worked in close partnership with the main treatment guys and local scientists."
A video of the work being undertaken is available online here.
- Thames proposes 11% rise in customer bills to fund Tideway Tunnel Thames Water is seeking an 11% increase in customer water bills between 2015 and 2020 to help pay for the proposed Thames... Read More >
- Welsh Water targets sewer blockage hotspot for new campaign Dwr Cymru Welsh Water has launched a major campaign in St Asaph to reduce sewer blockages and the risks of pollution and... Read More >
- Trade unions end 'emergency protocol' in NI Water pensions dispute The industrial dispute over pensions at NI Water has been stepped up with trade unions ending the emergency protocol that... Read More >
- Pipe liner does the trick for mending rising main A trenchless solution was found for a rising main sewer in Norfolk which had suffered from repeated bursts Read More >
- Rise of the 'wipe wash' clogs UK's drains and sewers A trend for using wet wipes to clean the body could be partly responsible for the repeated blockages which are the scourge... Read More >
- Private drains and sewers transfer - six years on October 2011 marked a major change in the way sewers and drains running from private properties into the public sewer... Read More >
- Out of Order With women and girls across the globe still waiting for access to basic sanitation, western-style sewers are probably not... Read More >
- The Rights and Wrongs of Misconnections Appliances which have been incorrectly connected to surface drains rather than sewers are a significant cause of... Read More >