I'm having a new dishwasher installed in an old house. The existing supply line is 1/2 inch copper. It will need a 3/8 inch adaptor for flexible hose with compression fitting. Pictures show existing hardware and the new hose to be attached. Does it look like the current adaptor is threaded into the red handled valve body? If so, I can just unscrew it and screw in a new one with 3/8 output. I'm scared to start trying to remove it and and discover that it's soldered. Thanks very much.