Thank you for your question. Here are the instructions on changing out your Delta Faucet model # RP4993. Two Handle Models and Single Handle Tub/Shower Mixing Valves*: Shut off water supply; cover drain opening.1.) Remove handle. (2.) Unscrew & remove bonnet. (3.) Pull stem unit straight out to remove. (4.) Lift rubber seat and spring out of body (two seats and springs on Monitor®, Scald-Guard® and Delta® Mix*). Before replacing the seats and springs, the ports they go into should be wiped out with a soft, damp cloth to remove any mineral deposits. (5.) Insert replacement spring into small hole in valve body (two holes in Monitor®, Scald-Guard® and Delta® Mix) by inserting large end first. Place new seat down over spring top. Reassemble as above. Important: On Monitor®, Scald-Guard® and Delta® Mix models, after reassembly, turn on water. Cold must flow first. If hot flows first, then shut off the water supply. If there are two notches in body, remove stem unit, rotate it 180° and reassemble.
Single Handle Ball Valve Models: Shut off water supply; cover drain opening.1.) Remove handle. (2.) Partially unscrew adjusting ring, remove cap assembly. (3.) Pull up on ball stem to remove cam and ball assemblies. (4.) Lift rubber seats and springs out of body. (5.) Look at holes from which seats and springs have been removed. If these holes nearly touch each other, replace the springs with those in this kit. Insert large end of spring first. If there is about 1/8" between these holes, reuse springs just removed. Before replacing the seats and springs, the ports they go into should be wiped out with a soft, damp cloth to remove any mineral deposits. (6.) Place new seats down over springs. (7.) Reinstall ball assembly with cam and packing. (8.) Install cap assembly hand tight, then tighten adjusting ring†. (9.) Replace handle. (10.) Remove aerator (if kitchen or lavatory faucet). Turn faucet on to mixed position and then open water supplies. Tighten adjusting ring (if supplied with your model) until no water will leak around ball when faucet is ‘on’ and pressure is exerted downward on the handle. Allow water to flow for one minute to flush any debris from lines. Check for leaks. Replace aerator.
Service Note: To stop a leak under the handle tighten cap assembly hand tight, tighten adjusting ring†. Always loosen adjusting ring† before attempting to remo