You will want to put a length of copper into the fitting and solder it before you put it on the galvanised so that you don't cook out the pipe dope.
>>they also could have soldiered on a flange on copper and thread on galvanized pipe.would have been another choice
Yes, this is often done in well systems by using a mechanical fitting on both. ie, a fitting glued to the PVC, that can be threaded onto the galv. pipe.
It is probably referring to the type of fitting. A fitting that is soldered to a copper pipe. It is called sweating when you use solder and a torch to connect copper pipe together or attach fittings to copper pipe.
A threaded copper fitting on the copper side, male or female, and the galvanized is screwed into it.
Take either an SOS pad or a wire brush and rough up both the inside of the brass fitting and outside of copper pipe, put the copper pipe into the fitting and solder around it.
Sweat a female fitting on the copper or use a compression coupling between the two.
In order to connect a chromed steel pipe to a copper pipe, you will need a brass fitting. These two pipes will not fit into each other otherwise.
Copper x copper, which means the fitting is sized for copper pipe and usually needs to be soldered unless it is a compression type fitting.
Either cut it out on the pipe with copper cutters or sweat it out with a plumbing torch.
Flare copper pipe and use a flared shutoff valve. If valve isn't flared, use an adapter fitting between copper flared pipe and valve.
When I have to connect copper to lead "D" I usually solder the copper to the lead or wipe a lead joint depending on the diameter To connect copper to cast iron ,.... If there is a hub I caulk the copper directly into the CI with oakum and poured lead (molten) OR one can solder / braze a female adapter fitting and screw the copper into a CI female fitting
No you cannot mix the fittings, the properties from the galvanised pipe will weaken the properties in the brass. It is always best to either change or repair a pipe or fitting with the same material.
It is pre galvanised pipe that is pipe manufacture GP SHEET/COIL