I have a 2yr old, 2 story home. I returned from Iraq about 6 months ago and noticed that at times the water will pulsate as it comes out of any fixture. I don't remember this problem existing before I deployed but it certainly exists now. It does not occur all the time and at times it is more pronounced then others. Lastly at times I can hear the pulsating in the pipes even if none of the water fixtures are currently turned on. I'm at my wits end and would appreciate any good ideas.