Our Kitch sink make makes a popping sound when ever the water is turned on, both the hot and cold. It has made the spray handle start leaking. The water coming out does not have a lot of pressure. I looked at the lines under the sink and they used some smaller line to the tuen off valve and then again to the line dish washer.
Could this be the problem? I also just found a leak in an other bathroom that I think is from this pressure changes. This house is 20+ years old but I do not see any repair plces in the pipping I can see. I was thinking I need to replace all the pipping under the sink to be 1/2. do you think this will fix this problem?

More details please! I need the name, the model and type of faucet. If way of popping noise. This is in the water and not the drain? Back to you, Tom