My husband has just installed our new kitchen faucet. However, the kitchen sprayer keeps leaking terribly(a waterfall actually) where it hooks up to the faucet. The directions say to snap the quick connect spray hose assembly onto the threaded valve sprayer nipple and to pull down moderately to insure the connection has been made. He's done this numerous times, but when the water is turned back on it immediately begins to leak. It is a Delta faucet. Please help!