This isn't another "clean the aerator" question.
I'm on city water. Over the past year, the flow has slowed. At first I thought it was the city reducing the flow because of the drought. We're on a 10% reduction of use mandate. Now, it has gotten to the point where we can only use one fixture at a time. Take a shower in the Master; it's fine. Flush the first floor toilet; no water comes out of the shower until the tank fills. We used to be able to use 2 showers at once.
Where do I start? I checked the meter, there is no flow through it when all the fixtures are in the off position so there isn't a leak.
Any help would be greatly appreciated.