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Re line 150mm water main

  • 1.  Re line 150mm water main

    Posted 03 April 2018 20:50
    Hi all,
    looking for feedback about re lining of water pipes.
    we have a 150mm water pipe and are restricted for space to renew, I was considering relining, but unsure as to which product would be suitable?
    the section of water pipe has 3 hydrants and 3 small water services, distance of 1000m.
    any industry feedback would be greatly appreciated.

    Natalie Eisenhauer
    Engineering Officer
    Riverina Water County Council

  • 2.  RE: Re line 150mm water main

    Posted 04 April 2018 22:09

    You can go for Berolina Pipe lining. Please see the link belwo



    Cured-in-place pipe (CIPP) is one of several trenchless rehabilitation methods used to repair existing pipelines.

    CIPP is a jointless, seamless, pipe-within-a-pipe with the capability to rehabilitate pipes with minimal diameter reduction.

    As one of the most widely used rehabilitation methods, CIPP has application in gravity (sewer) pipelines. ITS offers a localised system and is looking to acquire a full length CIPP system in the very near future.




    Alim Razi

    Senior Asset Officer

    Asset Management Branch

    NSW National Parks and Wildlife Service



    43 Bridge St Hurstville 2220

    T 02 9585 6394, 0401823297




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  • 3.  RE: Re line 150mm water main

    Posted 05 April 2018 23:47
    Hi Natalie,

    Is the pipe a critical line? If it is off for the duration of the relining works will you have major issues? I think when it comes to relining water pipes, the method used comes down to two elements - cost and importance of pipeline.

    If the line can be off for a sustained duration and the three properties serviced by a tanker or similar, you might want to look at pipebursting as an option, this will give you a new asset inside the same alignment (a lot of other relining techniques can be troublesome with water pipe). New service connections, hydrants and stop valves would then need to be installed on the new main.

    If you need it relined quickly and the line re-activated in a short timeframe, I'd have a look at spray lining. I don't know of any others that do it, but I know Abergeldie have a spray lining option for water mains. They can reline through hydrants, stop valves and service connections as well (cut out using robot afterwards), so reduces excavations required.
    I've had a look at spray lining for a few of our critical mains as an option for relining simply due to the low installation timeframe and the reduced dig ups compared with other options.

    With relining water lines, also be careful which products meet the drinking water guidelines, some of those listed by others here so far don't have approval.

    Joshua Rendell
    Water & Sewer Technical Officer
    Eurobodalla Shire Council


  • 4.  RE: Re line 150mm water main

    Posted 05 April 2018 01:30
    Hi Natalie -you did not say what the existing pipe material is.

    If it is cast iron with little external corrosion and good joints you could scrape it clean and concrete line it. That gives a very strong pipe for another 60 plus years. Needs a section of pipe (say 1.5 m long) removed every 100 - 120 m odd. So would take 8 - 10 days. Water is off to customer for about 12 - 14 hours so run temporary poly services above ground.

    If it is AC,you can epoxy line it, pipe burst it (pull in another new poly pipe or place buckled uPVC (C liner) and heat/pressure that to form a new pipe inside. I would use the pipe burst technique first.

    All of these will require sections removed so 8 - 10 days again plus temporary services

    Write a Bid Doc asking for options and float it out there.

    Roly NZ

  • 5.  RE: Re line 150mm water main

    Posted 08 April 2018 18:50
    ​CIPP lining of water pipes can be problematic because of the valves along the line and often the length between valves can exceed the ability of the CIPP liner installation and a new access point has to be cut into the pipe.  We have some strange valves in Australia that can require dig ups - but that could be a positive if the distances suit the CIPP installation.  CIPP has a special product for water lines so make sure you are not looking at sewer/storm drain CIPP applications.

    For small diameter and usually shallow water mains, pipe bursting and pipe splitting (depending on the pipe material) can be a more economical alternative to lining.  This way you get a new pipe in the diameter you need and even upsizing if additional capacity is needed.  Some pipe bursting operations are using the new fusable PVC but typically will use HDPE for replacement material. Sometimes replacement of small diameter pipes is the cheapest alternative with the longest service life.  Rehab is not always cheaper - you need to do a whole of life cost analysis to figure out which is the best option.

    NASTT (Nth American Society of Trenchless Technology) has some excellent guidelines for pipe bursting and I believe that ASTT (Australasian Society of Trenchless Technology) has put on courses in OZ based on the NASTT guildelines.

    ASTT website has a good contractor look up tool to find contractors in OZ with rehabilitation specialties.

    Alison Ratliff
    Coffs Harbour City Council


  • 6.  RE: Re line 150mm water main

    Posted 02 February 2020 18:21
    Hi Natalie,

    I see this post is from a long time ago, Just curious as to how you ended up going with it?

    Did you find someone able to do the job?

    This is something our company would be able to look at spray lining. No need to excavate hydrants or services as we can reline past both without blockage.

    Would like to know more about how it worked out.

    Thank you