Kinked MDPE

[reb78]

Putting in some new 25mm MDPE mains pipe from the field today I managed to kink it just as I was pushing it into the manhole.

I was trying to avoid too many buried joints. What are the general opinions - Is it likely to be ok or should I cut it and put a join in?

 

[mike os]

I usually join, prefer not to risk it

 

[reb78]

Thats the way i am heading! Cant face another leak on this pipe and this will be buried!

 

[cheb]

From memory there's a 10% loss of maximum working pressure allowed if it's kinked. I looked it up years ago when it mattered to me.

Have you seen the clamps the water companies used when working on them? Basically they squash the pipe flat between two metal tubes.

https://www.toolstation.com/squeeze-off-tool/p39855

 

[Welderpaul]

You can get rerounding tools. Used for when the pipe has been squeezed off. They can be bought cheaper than this, just the first one google found.

MDPE is designed to be squeezed off, a kink may reduce pressure, especially if it is a bad one.