P2A - Pressure Gauge
another option? if you google several below and around 10 bucks. mine was around 7 bucks 0 to 100 gauge will be more accurate that 0 to 300 gauge, but really don't matter. these you just screw on water hose turn the water on or just connect at the outside house faucet. that will tell you the water supply pressure. After that you have to figure out if it main line problem or individual station valve problem. Home depot, Lowes, or ace probably has them in stock?