Are support sleeves necessary for copper pipe compression fittings

[davblo]

Hi,

This must have been discussed in the past but with a quick search I couldn't find the answer I wanted.

What is the view of using support sleeves inside copper pipes for compression joints.

(The pipes in question are 28 mm and 35 mm diameter so I'd expect them to be pretty strong anyway.)

Are they...
a) essential?
b) recommended?
c) optional (depending on situation?)

 

[SimonG]

Only on 10mm oil lines.

 

[Ric 2013]

Hardly ever used in run-of-the-mill plumbing. I wouldn't even know where I would buy them. Think Viessmann boilers come with them for the final connection to the boiler.

 

[davblo]

Hardly ever used in run-of-the-mill plumbing. I wouldn't even know where I would buy them. Think Viessmann boilers come with them for the final connection to the boiler.

Thanks for the response!