Can you connect a copper fitting to cast iron , it' for boiler can I screw a copper pipe into
A female iron fitting or do I need a special fitting to connect iron to copper

Can you connect a copper fitting to cast iron , it' for boiler can i screw a copper pipe into
a female iron fitting or do i need a special fitting to connect iron to copper
You need n o special fitting to connect copper to iron. We do it all the time when we connect up water heaters, (copper adapters to a iron tank). Good luck, Tom