Hi Dave, Thank you for your question. To stop a dripping 472-DST faucet you will first need to shut off the water supply to the faucet. Pry off the red/blue indicator button on the handle to access the set screw that holds the handle on the faucet. Use a 1/8" allen wrench to loosen the set screw, pull up to remove the handle. Unscrew the cap, and the bonnet nut in a counter-clockwise direction to remove and access the RP50587 valve assembly. Tightening the bonnet may stop the drip, if not the RP50587 will need to be replaced. Here is a link to the manual for your faucet model to help with the repair.
Date published: 2017-03-28