I have a thumping sound when I turn on the kitchen faucet. At first, it was only when using the purifier. Now it does it all the time even with the hot water. I am concerned that something is going to burst and I'll have water everywhere. Thanks!

What's the brand name of your faucet? One handle of two knobs? How old? Please explain "purifier". Does it mount on the spout or in the cabinet? Let me know, Tom