"AlanD" wrote in message
...

Why not just use solder fittings?
I (like many) consider push-fit to be crap, especially on CH systems.
Soldering really isn't hard, and will remain mechanically strong and
leak-free for decades. Push-fit relies on rubber 'O' rings.

I have seen copper pipe fail after less than 20 years and fittings that
never worked, I have yet to see any plastic pipe/joints/fittings fail even
in heating systems.
I have plastic pipe in my heating system, its ~29 years old.