Water in, water out. Money in,money out. Easy-peasy

Anonymous has left a new comment on your post "Everybody's Dong It.....Doing it .....doing it.":

here are the facts, right from Canada Pipe web site , looks like your right again according to the manufacturer , the only thing that can improve the life span of the pipe is an external treatment of polyethylene, not internal , is this what you mean by Region Mentality at its finest

IRON PIPE - THE HISTORY AND THE FACTS

In 1664, King Louis X1V of France commissioned the construction of a cast iron watermain, which lasted more that 342 years in service.
Cast iron watermain pipe was first used in North America, circa 1800, in the Philadelphia water systems.
There are currently over 23 cities in North America with cast iron pipe still in service after 150 years (before the invention of electricity and the automobile).
There are over 622 towns/cities in North America with cast iron watermain in service after 100 years.
Nine or more reasons for watermain failure are related to strength. Ductile Iron Pipe is the strongest watermain pipe available, by a very large margin.
Ductile iron is machined for engine parts such as crankshafts and connecting rods, plus various brake and steering components, due to its strength and reliability.
Ductile Iron Pipe has the largest available inside diameters vs. all other watermain pipe products currently available, and therefore has the greatest hydraulic capabilities in the industry.
In 1922, cement mortar lining of cast iron watermain was first used to protect the interior wall of the pipe and improve water quality.
Cast or Ductile iron Pipe corrodes only as a function of its underground environment, hence the extremely long life in so many installations.
Soil evaluation technology today can determine whether or not ductile iron pipe requires special corrosion protection.
Since 1958, polyethylene encasement has been used successfully to prevent the corrosion of iron watermains in some of the most corrosive locations in North America.
The success of polyethylene encasement has created the adoption of standards by ANSI, AWWA & ASTM (U.S.), plus ISO 8180 (International) and individual standards for Great Britain, Japan, Germany and Australia

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It's amazing what we  discover with a click of the mouse.  

But  the pipe described about is water main .

Sewer mains are concrete  or plastic or one other material.

It makes no never mind.

The question is ,why are we cutting into pipes to install fibreglass liner?

We are told it is to stop  ground water from infiltrating into the sewer to cut down the volume going to the treatment plant. 

You would think before undertaking such a project,a way to prove   effectiveness of the method would have been shown 

The same outfit  gets the contract every year.

You would think if standard  pipe has proven to  need a firbreglass liner to stop ground water from infiltrating , the manufacturers might  have been asked by now to construct a pipe that doesn't allow ground water to inflitrate. 

That is, if it is proven ground water is infiltrating. 

You would think if ground water filters into a  pipe, it would also filter out of the  pipe.

That would surely be a greater problem. 

You would think municipalities wouldn't keep spending between  seven hundred thousand  and a million dollars each year for  a process  not proven to be effective.

But we are. 
  
We don't even know if  ground water is getting into the pipe.

In the sixties, people would  quite simply have regarded the  exercise as a huge boon-doggle.

Nobody would have accepted  the rational offered.
See how we have evolved? 
We ask questions.
We don't get answers.
But the money goes out the door anyway.