Thank you for your question. Directions for installation of Delta Faucet model # RP5834 come on a card in the clamshell. Below find the instructions copied from that card:

1. Connect bottom outlet to spout using NEW piece of 1/2” threaded pipe installed so that end of nipple projects out from wall surface 5/8” to 1-5/8”.
2. Apply plumber tape to pipe threads and hand tighten adapter onto nipple. Finish tightening with adjustable wrench one additional turn.
3. Hand tighten tub spout onto adapter taking care not to damage the o-ring.

Important:
Tighten spout a minimum of one additional turn or until all slack is taken up behind wall.

Thank you for your question. Delta Faucet model # RP5834 does include the adapter assembly.

Thank you for your question. Delta Faucet model # RP5834 can either be sweated onto a 1/2" Cooper water tube or threaded onto a 1/2" Iron pipe.

Thank you for your question. Delta Faucet model # RP5384 comes as a complete tub spout. If there is an issue with the diverter, then the entire tub spout will need to be replaced. Please contact our Home Owner/Warranty line at 800-345-3358.