The problem. If I flush the toilet and turn on the sink faucet the water just barely comes out. Once the toilet tank is full if I turn on the faucet the water starts out strong but then starts slowing down. We cannot use the shower because of this. I have read about testing the flow using a 5 gallon bucket and timing how many seconds it takes to fill it. Ha it would take about hours to fill it not seconds. I called the water district and they check out the main valve from the their water line and said it was bad. They either replaced or repaired it saying they set the pressure to 60 lbs. They also said the type of valve I have is not adjustable. I am assuming that means the valve is set with maybe a pressure spring on the inside. (guessing). I do have a pressure regulator under the house but the water was fine until just last week.(It has always been a little low) I still have the problem. What would be the best way to find if it is an incoming problem with the valve or something in the house. Would this be a pressure or flow problem? Thanks for any help.