Which pipe joint is more reliable?

[shagster]

Assuming all parts are new:

- 15mm Copper pipe into JG speedfit (the twist lock ones)

or

- 15mm speedfit pipe into copper compression (assuming the correct insert).

I'm just wondering, since I have a choice, which will hold up best.

thanks,
S.

 

[Charnwood]

My vote would go for compression, but if I was doing the job I'd probably use Speedfit fittings. (Lazy barsteward.)

 

[shagster]

That's what I would have thought too. I actually connected the blue supply pipe to a copper compression fitting *without* any insert, and it didn't leak (put the insert in later once I figured out my mistake ), so it must be pretty secure. I guess the only problem is if you go overboard with the tightening and split the thing.


cheers,
S.

 

[Charnwood]

MDPE (blue supply pipe) is much thicker. I'd not be too bothered about inserts in that for reasons too long to go into. BUT! I'd never do a PEX or PB joint without a liner, compression or push-fit.