Step 5 · Mount the New Faucet
Unpack your new faucet. If it comes with a base gasket, place it over the faucet holes. If not, apply a 1/4-inch rope of plumber's putty to the underside of the faucet base. Carefully feed the faucet's tailpieces and any attached hoses down through the correct holes in the sink deck. From underneath the sink, slide on any supplied washers and thread the mounting nuts onto the tailpieces. Hand-tighten them to hold the faucet in place. Install the side sprayer base in its hole, feed the hose through, and secure it with its nut from below.