I'm replacing and old Moen tub deck mount faucet set with a new valve(s). Both valve inlet and outlets are threaded but on the old set I took out the copper tubing is inserted into the fitting and somehow welded to the valve. assuming it was soldered I tried heating it up but the tubing does not release. Questions: 1) what was used to weld the tubing to the brass valve ? Doesn't seem to be solder. And 2) can I solder the copper tubing into these brass fittings on the new valves ?
Thanks
Thanks