Convert Slip On Tub Spout To Threaded . Wife wants a more decorative spout that is 1/2 slip on and the spout says slip on over 1/2 copper wire. Put something in the tub below to catch any drops of molten solder. Copper pipe too short for tub spout Terry Love Plumbing Advice from terrylove.com Once the insert is removed the spout threads will have glue in them, that glue needs to be removed. The set screw is usually and allen head and recessed. Moen's packaging is colour coded by project.