Water coming into your home is measured in pounds per square inch and usually ranges from 35 to 100 PSI. The happy medium is somewhere between 40 and 50 PSI. When water pressure is very low, faucets may trickle and some appliances, like water heaters and icemakers, don’t function properly. When it’s very high, you might hear pipes bang… or in extreme cases…lines can burst and flood your home. The solution for these ills is a global valve which regulates water pressure and allows you to adjust them to acceptable levels. First check the water pressure with a gauge that screws onto an outside faucet, these are available at most hardware centers. If the pressure isn’t acceptable, then it might be worth talking to a plumber about installing a global-valve.