I have a house built in the 1950s and assume that my existing water pipes are galvanized steel. I would like to re-pipe with copper. I'm new to this so I would not be able to complete this in one day. I've been thinking about how I would handle my stopping point each day because wherever I stop for the day, I would have to join the new copper and old galvanized. Is there an easier way to doing this than having to cut and thread the galvanized steel and put on a threaded to solder coupler? I don't have a pipe threader and I see they are expensive. Could I temporarily use a rubber hose and hose clamps?