"Harry K" wrote in message
oups.com...
On Feb 17, 4:57 am, "John Gilmer" wrote:
I don't understand. I AM trying to go from copper to plastic. Are you
talking about the ones with the hose type, rotating fitting?

You are going from a female copper/brass to male plastic (if I read
things
correctly.)

I was suggest that (if the situation permits) you should go from 1/2"
copper
tubing to a female plastic adapter.

snip

Any reason for recommending the female plastic?

That goes against all
the advice I have seen. I also had the benefit of using a female
plastic to iron transition. Got to dig it up in the spring to fix the
leak caused by the female adapter splitting on the casting line.


I'm talking about the adaptors that have a elastic ring which actually seals
the connection. Short of the plastic cracking, the seal should be sound
regardless of on expansion due to temperature.

The only leaks I have ever had other than the above (and I've done a
lot of plastic over the years) was in using 1/2" size. Never a big
leak and fortunately were always in my basement so it wasn't a
problem. I just let them go and they sealed themselves after a time.

Threaded joints (with dope) often seal themselves. Occasionally, a sloppy
solder joint will do the same thing. The sealing depends upon there being
some crap in the water to slow down the leak and some minerals to really
seal things up.


Harry K