How reliable are push fittings?

[markymark2406]

As above question on adding a new rad and T' ing off a flow and return ?

 

[joe-90]

There are 100,000,000 in use. I guess they must work.

 

[xr4x4]

Whats the life span of a rubber o ring?

 

[joe-90]

I've heard it's 25 years.

 

[xr4x4]

I've heard it's 25 years.

Bingo..

I'm sure if you told people that, some customers would insist on copper.

 

[joe-90]

The price gap is getting ever wider. The odds are that the O ring will outlast the guarantee by a fair margin so the whole lot will be pulled out and redone in the future. Thirty years from now I doubt that you'll see copper.

 

[gas112]

and why is that joe?