I recently replaced my moen posi-temp cartridge because a luke warm water. Now with everything replaced in the same order that it came out, I know have a banging noise when I turn the water off anywhere in the house. Our house is only five years old, and did not have the noise before the cartridge install. What did I do wrong?

Back in the 60's we were required to to put air chambers on all bath lavatories and kitchen sinks. Over time water and condensate built up in them and they must be recharged. First turn off the house at the main house shut off valve. Then open hot and cold faucets at the farthest bathroom to prevent air lock.(This is important.) You will find under each fixture little brass or chrome valves. These are called angle stops. With a small pail held under the angle stop to catch the run off look under the handle of the stop and you will see a nut with the stem running through it. This is called the bonnet packing nut. Put your wrench on it and back it off counterclockwise. Now open the stop and remove the stem and washer assembly, The stop will began to drain. When it has quit draining reassemble the stop and move on to the next one. Do this on each one of your angle stops. There will be six of them in a two bath home. When you are done, close off the faucets you have opened, turn on the water to the house, and give yourself a pat on the back.
You have just recharged your air chambers and saved yourself a hefty service call bill. Hope this helps you out and thank you for rating my reply. TOM

I will give this a try today. Thank you. When you are counting six stops, that is one sink and I toilet per bathroom correct. Do I also need to do the kitchen stops as well.

Thank you for the help. I recharged my system but I did not doit at the stops. I just turned off the water and opened every faucet in/out of the house for 15 min, then closed everything and turned the water back on. It did the trick. Once again thank you.