Best Ferrules to use on copper radiator piping?

[Mike13]

As title, changed the radiator valve for a thermostatic about 2 years ago, no problens till now.
Seems to leak worst at night when it cools down more.

Anyway, hacksawed a slot in it diagonally at used a scewdriver to cam it open.
Brass ferrule now off, about to clean pipe.
What are the votes for ferrule ytpe to replace? I have coper, plain brass, and one that seems to have external ridged in it?

Does it not matter, if so why did the last one suddenly fail?
A dose of LS-X around the pipe and ferrule before tightening up the fitting didnt work, failed the same night.

 

[avonmouth]

If you are talking about olives then i prefer the copper ones as they are softer and easier to crank tight.

 

[Mike13]

Thanks,
Yes, it is an olive I was trying to fix

I will use the copper one.

 

[ChrisJP]

I agree copper olives are better than brass ones. Irritatingly though, nearly all compression fittings come with brass olives, forcing you to buy the copper ones separately - and they're not always easy to find

 

[denso13]

Does it not matter

On copper no, just use what comes with the fitting, or what's to hand if you have loose ones.

 

[CountryFan]

If you are talking about olives then i prefer the copper ones as they are softer and easier to crank tight.

Oddly I've always preferred brass olives they tend to leak less

 

[avonmouth]

Oddly I've always preferred brass olives they tend to leak less

It comes with experience.....49 years in my case.

 

[Mike13]

well I had some of each lying arond. so wanted to see what people preferred.

 

[CountryFan]

It comes with experience.....49 years in my case.

21 in my case but still prefer brass