I had a problem with the old ones water wouldn't shut off all the way had a constant drip, so I had them replaced. Prior to this I had changed all my plumbing from 1/2 in to 3/4. so I barely have to turn the knobs on and I got a very strong water flow (not the problem). ****so when I turn the water on I can see the handle starts to move slowly off now this is effecting me to find a happy medium of water temp. it seams I barely have to use any cold water and now since the pressure is so much I am running out of hot water quickly.