Water Main Relining
Water Main Relining
(OP)
I am considering lining some old cast iron pipes, in lieu of dig and replace. The process appears to involve cutting open the existing main, pull a liner through, then inflating this liner with water or steam. Once the liner cures, a robot runs inside the pipe and cuts holes at the service taps.
Anyone here tried this before? I am curious how long this process takes, and how to run a secondary water system to keep residents in service as the main is being relined.
Anyone here tried this before? I am curious how long this process takes, and how to run a secondary water system to keep residents in service as the main is being relined.





RE: Water Main Relining
At the present time, it is more cost effective to install new pipe with directional drilling than attempt to line water mains.
It is more feasible to line sewers than water mains.
RE: Water Main Relining
The scraper and lining machine can go through 22.5 degree bends, but anything more than that you have to dig up.
The process involves scraping the main, pigging it to remove all debris, mortar lining followed with a trowel (funnel), cure, inspect, replace valves, refill, sterilize, and back to service in about 8 days. Bypass lines feed the customers during the interim, so in cold areas we have to do this in non-freezing weather.
RE: Water Main Relining
www.uctonline.com. You can get exhibitor names from both to call.
Richard A. Cornelius, P.E.
WWW.amlinereast.com
RE: Water Main Relining
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RE: Water Main Relining
You should also calculate the carbon footprint for 'cut and cover' and the CIPP process to help sell the process to the owners.
Richard A. Cornelius, P.E.
WWW.amlinereast.com
RE: Water Main Relining
It is also easier to transfer the services to new pipe than it is for lining projects. Unlike with lining projects, services can be transferred to new pipe with relatively minor distruption.
RE: Water Main Relining
When using CIPP to line a water main, there is no excavation at the service lines. It is all done with robots inside the pipe. When HDD replacement you have to dig each service to reconnect.
Richard A. Cornelius, P.E.
WWW.amlinereast.com
RE: Water Main Relining
If you install a new pipe, each dividual service will be shut off for less than a day while you transfer the service from the existing water main to the new water main.
Maintaining service will be required for lining projects.
RE: Water Main Relining