I replaced the faucet on my tub today, and now when I pull the knob on top up to turn on the shower, the tub faucet slips off the copper pipe and shoots into the tub! There is no threading on the copper pipe. There is a piece of pvc that slides over the copper pipe, that has a metal collar with a single screw. The end of the PVC has threads and the faucet screws to that. I hope that makes sense.
TIA!
TIA!