Re: Water Pressure
A restriction will not reduce pressure if there is no water flowing. So just hooking up a pressure gauge to various faucets won't tell you much.
You might be able to hook the gauge up to the faucet that's closest to where the water line enters the house. Then, have a helper remove the aerator from each faucet and open it fully while you watch the gauge. The pressure will drop each time a faucet is opened, and return to the "static" pressure when the faucet is closed.
With that, you may be able to identify where the restriction is. The greater the restriction, the less the pressure will drop. If you notice that it drops more at faucets B,C, and D but doesn't drop much at E, F, and G, the restriction may be between D and E. (Assuming that you're at A, B is the next one on down the line to G at the very end.)
One common place for restrictions is at shutoff valves. These often have an orifice that is smaller than the pipe, and junk can get caught there. Sometimes you can work the valve open and closed while water is running and that will free it up. Other times you have to dismantle and clean out the valve (but at that point you might as well replace it with a 1/4-turn ball valve which won't plug as easily).
The "Senior Member" designation under my name doesn't mean I know a lot, it just means I talk a lot.I've been a DIYer since I was 12 (thanks, Dad!). I have read several books on various home improvement topics. I do not have any current code books I can refer to. I was an apprentice plumber for two years.