On 11/16 my plumber installed a replacement kitchen faucet for the leaking very old faucet that was there.  The next morning we looked under the sink and saw that whenever we used water there was a puddle under the faucet under the cabinet.  It was determined that that faucet was defective and a 2nd 400-DST was installed Fri. 11/23.  That too was leaking and had to be replaced.  Today the problem was solved.  It was replaced with a good quality Moen faucet.  I had some Delta products previously installed in the house, but NO MORE after this hassle.